Joseph T F Lau

The Chinese University of Hong Kong, Hong Kong, Hong Kong

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Publications (237)649.44 Total impact

  • Zixin Wang, Tiejian Feng, Joseph T F Lau
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    ABSTRACT: Voluntary medical male circumcision (VMMC) is an evidence-based biomedical HIV prevention method. It is under-utilized in countries outside Africa, including China. The present single-arm, non-blinded test-of-concept trial was designed to promote VMMC among 179 male sexually transmitted diseases patients (MSTDP) in Shenzhen, China. It was based on behavioral health theories and results of a formative survey. At month 4, 45.5 % of the MSTDP responded positively to the intervention (19.9 % had taken up VMMC and 25.6 % intended to do so in the next 6 months). Adjusted analysis showed that cognitive variables measured at baseline (perceived self-efficacy, subjective norm and behavioral intention) significantly predicted adoption of VMMC during the 4-month follow-up period. Process evaluation involving clinicians of the STD clinics was positive. At month 6, 36.0 % of the circumcised participants used condom less frequently with their regular sex partner. We recommend scaling up the intervention, taking prevention of risk compensation into account.
    AIDS and Behavior 03/2015; DOI:10.1007/s10461-015-1040-z · 3.49 Impact Factor
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    ABSTRACT: HIV antibody testing is a key measure of HIV prevention for men who have sex with men (MSM). The World Health Organization recommends sexually active and at-risk MSM to take up HIV antibody testing regularly. This study aimed to investigate the prevalence of behavioral intention to take up HIV antibody testing in the next six months among Hong Kong MSM who were ever-testers. An anonymous cross-sectional survey recruited 326 MSM who had taken up HIV antibody testing from gay-friendly venues and internet in Hong Kong. Of the participants, 40.8% had had unprotected anal intercourse with regular or non-regular male sex partners in the last six months; they were at risk of HIV transmission despite experience in HIV antibody testing. Only 37.2% showed a strong intention to take up HIV antibody testing again in the next six months. Adjusted analysis showed that both perceived discrimination toward Hong Kong MSM (AOR = .60, 95% CI: .36-.98) and the CARE Measure assessing perceived empathy of service providers (AOR = 1.05, 95% CI: 1.02-1.08) were significantly associated with intention for retesting. Perceived discrimination, however, became statistically non-significant (AOR = .68, 95% CI: .41-1.14), when both CARE Measure and perceived discrimination entered into the adjusted model. It is warranted to increase HIV retesting rate by removing perceived discrimination and reducing the negative effect of perceived discrimination through enhancement of empathy of service providers.
    PLoS ONE 02/2015; 10(2):e0117376. DOI:10.1371/journal.pone.0117376 · 3.53 Impact Factor
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    ABSTRACT: Inhaled nitrites are commonly used by men who have sex with men (MSM) in western countries. As such compounds are not illicit, they are widely available in China. Recent studies have documented a high prevalence of inhaled nitrites use in this population.
    Drug and Alcohol Dependence 01/2015; 149. DOI:10.1016/j.drugalcdep.2015.01.021 · 3.28 Impact Factor
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    ABSTRACT: The Illness Perception Questionnaire-Revised (IPQ-R) has commonly been used to measure illness representations of various diseases. The present study examined whether the original factor structure of the IPQ-R could be confirmed or a new structure could be established on substance dependence among injecting drug users (IDU) in China. A total of 257 IDU completed the 38-item IPQ-R on substance dependence. Results of confirmatory factor analysis (CFA) showed that the 7-factor structure as proposed by the original IPQ-R reported poor goodness-of-fit statistics. Although removal of 12 items improved the model fit, the goodness-of-fit statistics were still below acceptable standards. Furthermore, factors obtained from the exploratory factor analysis (EFA) of the IPQ-R were not interpretable. The CFA found that the original IPQ-R factor structure fit the data poorly. Factors derived from EFA were also not interpretable. Use of the IPQ-R for assessment of illness representations of substance dependence among IDU in China is cautioned until further validation. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.
    Drug and Alcohol Dependence 01/2015; 148. DOI:10.1016/j.drugalcdep.2015.01.008 · 3.28 Impact Factor
  • Phoenix K H Mo, Jing Gu, Joseph T F Lau, Hua You
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    ABSTRACT: Sexually transmitted disease (STD) increases risk of HIV infection and has profound psychological consequences. The present study examined the mental health problems (poor emotional well-being, insomnia, probable depression) and their associated factors among monogamous Chinese female STD patients. A total of 537 Chinese female STD patients who self-reported having had only one male sex partner in the last 12 months were recruited from a STD clinic in Hong Kong. They completed a survey including measures of mental health, STD-related history, perceptions, feelings related to STD infection, and perceptions toward condom use. Results showed that 22% had poor emotional well-being, 25.7% had insomnia, and 43% were probable cases of depression. Unemployment, worsened relationship with partners after STD diagnosis, STD history in last three months, finding STD examinations embarrassing, and feelings of helplessness were significant risk factors for poor emotional well-being and insomnia. Also, unemployment, worsened relationships with partners after STD diagnosis, and perceived high chance of STD in the coming six months were significant risk factors for probable depression. Perceived efficacy of condom use for STD prevention was a significant protective factor against poor emotional well-being and probable depression. Findings suggest that interventions are warranted to improve the mental health among this population.
    AIDS Care 11/2014; 27(4):1-8. DOI:10.1080/09540121.2014.972321 · 1.60 Impact Factor
  • Anise M S Wu, Joseph T F Lau
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    ABSTRACT: This paper provides an overview of gambling issues in China, including historical development, governmental responses and social consequences.
    Addiction 09/2014; DOI:10.1111/add.12710 · 4.60 Impact Factor
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    ABSTRACT: Objective Female injection drug users who are also sex workers (FSW-IDUs) occupy a pivotal population in HIV transmission, whereas their mental health problems are largely overlooked. We aimed to investigate prevalence and associated socio-ecological factors of depression, suicidal ideation and suicidal attempts among FSW-IDUs in China. Methods Using snowball sampling methods, 200 FSW-IDUs were recruited from communities in Liuzhou, China. Anonymous face-to-face interviews were administered by trained doctors. Results Thirty-nine percent of participants had severe or extremely severe depression, 44.7% had suicidal ideation in the last six months and 26.8% had suicidal attempts in the last six months. After adjusting for background variables, self-stigma was significantly associated with severe or extremely severe depression (OR = 1.18, 95% CI: 1.07-1.31). Self-stigma (OR = 1.08, 95% CI: 1.01-1.15), depression (OR = 1.11, 95% CI: 1.05-1.18), having completely broken up with family (OR = 2.60, 95% CI: 1.35-5.02) and having been abused by clients or gatekeepers (OR = 2.15, 95% CI: 1.32-3.50) were associated with suicidal ideation in the last six months, while self-stigma (OR = 1.03, 95% CI: 1.10-1.16), depression (OR = 1.12, 95% CI: 1.04-1.20) and being abused by clients or gatekeepers (OR = 2.15, 95% CI: 1.09-4.24) were associated with suicidal attempt in the last six months. In mediation analyses, the associations between self-stigma and the two suicidal outcomes were fully mediated by depression. Conclusions There are unmet mental health needs of FSW-IDUs. Screening of mental health problems should be integrated into current HIV-related services. Psychological intervention efforts should include components such as self-stigma, family support and abuse.
    Drug and Alcohol Dependence 09/2014; DOI:10.1016/j.drugalcdep.2014.08.011 · 3.28 Impact Factor
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    ABSTRACT: This study investigated event-specific factors that determine episodes of unprotected and protected anal intercourse (UAI and PAI) among 215 men who have sex with men (MSM), who used condoms inconsistently with nonregular partners (NRP) in the last six months, in Hong Kong. A case-crossover study design was used. Lower likelihood of episodes involving UAI with NRP was associated with (1) five partner attributes (NRP were <35 years old, at least three previous anal sex experiences with the NRP, perception that participant and the NRP had asymmetrical sexual experience, perception that the NRP was feminine, and liking toward the NRP; OR = 0.16-0.52), (2) six situational variables (the participant having had UAI with another man in the last week, having discussed condom use, perception that the NRP liked to use condom, partner's suggestion to have PAI, participant's suggestion to have PAI, and participant's plan to use condoms; OR = 0.11-0.39), and (3) four environmental/setting variables (condoms already placed at the venue, display of condom use promotion materials, participant's possession of a condom, and the NRP possessed a condom; OR = 0.27-0.45). HIV prevention targeting MSM should focus on event-specific protective factors, which may be different from those obtained from studies distinguishing condom users versus nonusers.
    BioMed Research International 07/2014; 2014:475195. DOI:10.1155/2014/475195 · 2.71 Impact Factor
  • Wei Liao, Joseph T F Lau, Hi Yi Tsui, Jing Gu, Zixin Wang
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    ABSTRACT: Compulsivity is defined as "an insistent, repetitive, intrusive, and unwanted urge to perform specific acts often in ritualized or routinized fashions." Sexual compulsivity has been shown to be associated with some high risk sexual behaviors related to HIV and sexually transmitted infection (STI). In some Western countries, the 10-item Sexual Compulsivity Scale (SCS) has been developed to assess people's sexual compulsivity but no Chinese version has been validated. This study validated the Chinese version of the SCS and investigated its associations with specific sexual behaviors. In 2008, a random telephone survey was conducted in the sexually active male general population in Hong Kong, interviewing 1,048 participants. The Chinese version of the SCS was found to be internally consistent (Cronbach's α = 0.88 for the overall scale), with a mean total score of 20.7 (SD = 4.7). An exploratory factor analysis procedure extracted two factors that were named Controllability and Functional Consequences. Higher SCS scores were associated with multiple female sexual partnerships in the last 6 months, having had sex with either non-regular partner(s) or female sex worker(s) in the last 6 months, having contracted STI in the last 6 months, and inconsistent condom use with either non-regular partner(s) or female sex worker(s) in the last 6 months. The scale can be used to assess sexual compulsivity among sexually active Chinese men in Hong Kong. It can potentially be used in other Chinese communities. Further confirmatory studies are warranted.
    Archives of Sexual Behavior 07/2014; 44(3). DOI:10.1007/s10508-014-0317-z · 3.53 Impact Factor
  • Phoenix Kit Han Mo, Joseph Tak Fai Lau, Xiaonan Yu, Jing Gu
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    ABSTRACT: Human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) has a profound impact not only on the infected individuals, but also on their families. Children of the HIV-infected parents are particularly affected. The present study examined the relationship between social support, resilience, posttraumatic growth (PTG), hopelessness, and depression among 195 children of HIV-infected parents in mainland China. Results showed that 35.4% of the sample scored above the cutoff of the Children's Depression Inventory. Results from structural equation modeling reported that social support had a significant positive relationship with resilience and PTG. Higher levels of resilience and PTG were associated with lower level of hopelessness which in turn, was associated with lower level of depression. The overall model achieved satisfactory fit. Interventions are needed to improve social support of the children affected by HIV so as to improve their mental health.
    AIDS Care 06/2014; 26(12):1-8. DOI:10.1080/09540121.2014.923810 · 1.60 Impact Factor
  • Phoenix K H Mo, Joseph T F Lau, Xiaonan Yu, Jing Gu
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    ABSTRACT: Human immunodeficiency virus (HIV) carries a high level of stigma to the HIV-infected individuals and their family members. Children of HIV-infected parents in China are particularly affected. The present study examined the relationship between associative stigma, self-esteem, optimism, anxiety and depression among 195 children of HIV-infected parents in rural China. Findings showed that more than one-third (35.4 %) of the participants scored higher than cut-off for depression; and 23.6-67.7 % of them scored higher than cut-off for different types of anxiety disorders. Structural equation modelling revealed that associative stigma had a significant negative relationship on self-esteem and optimism, which were associated with higher levels of depression and anxiety. The indirect effects of associative stigma on depression and anxiety were significant. The overall model showed a satisfactory fit. Findings suggest that associative stigma has a significant negative impact on mental health of children affected by HIV. Interventions to reduce their associative stigma are warranted.
    AIDS and Behavior 05/2014; 19(1). DOI:10.1007/s10461-014-0809-9 · 3.49 Impact Factor
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    Yong Cai, Joseph T F Lau
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    ABSTRACT: The HIV prevalence and incidence among men who have sex with men (MSM) are high. Unprotected anal intercourse (UAI) with male regular partners (RP) is an important but under-emphasized risk behavior. The current study aimed to describe the prevalence of UAI with regular partner and the associated multi-dimensional factors with UAI among MSM in Hong Kong, China. Respondent Driven Sampling method was used to recruit participants. A total of 285 participants were recruited, of whom 211 (75.1%) had had anal sex with RP in the last six months and their data were analyzed in this report. Weighed data were presented and logistic regression methods were fit. Participants' high risk behaviors in the last six months included high prevalence of having had UAI with RP (45.8%), having had non-regular male sex partners (NRP: 27.3%) and UAI with such partners (18.9%). Adjusted for socio-demographic variables, factors associated with UAI with RP included: 1) substances use prior to having anal sex (65.7% versus 43.8%; AOR =2.36; 95% CI =1.07-5.18), 2) worry that condom use symbolizes mistrust (67.9% versus 44.3% ; AOR = 2.91; 95% CI =1.19-7.10), 3) a lower perceived degree of the RP's acceptance of condom use (91.7% versus 38.3%; AOR = 22.70; 95% CI =6.20-83.10), and 4) a higher level of impulsivity (61.1% versus 35.0%; AOR =4.02; 95% C I = 1.62-9.97). Two of these four variables, substances use (ORm = 2.28, 95% CI = 1.01-5.16) and perceived lower level of RP's acceptance of condom use (ORm = 17.22; 95% CI = 5.06-58.62) were selected by the forward stepwise logistic regression model. MSM with RP in Hong Kong is subjected to high risk of HIV transmission. Risk factors of UAI are multi-dimensional and interventions need to take into account factors of structural, interpersonal and individual levels.
    BMC Infectious Diseases 04/2014; 14(1):205. DOI:10.1186/1471-2334-14-205 · 2.56 Impact Factor
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    ABSTRACT: Methadone maintenance treatment (MMT) is a key risk reduction measure for controlling HIV transmission among drug users. Studies using traditional methods exist to distinguish between drop outs and nondrop outs. However, many nondrop outs use MMT discontinuously and no study has identified situation-specific factors predicting their showing or not showing up. This study used a case-crossover design comparing situation-specific factors appearing on the last episode of attendance versus those of the last episode of nonattendance. A total of 133 participants were recruited from two MMT clinics in Guangzhou, China. Participants were asked separately whether various situation-specific factors existed in the last episodes of nonattendance and attendance of MMT. Matched odds ratios (ORs) based on conditional logistic regression analysis were presented. The results showed that the participants attended the MMT clinics on average for 25 days in the last month. Situation-specific factors significantly predicting nonattendance included: (1) physical and mental health status: in illness (OR = 33.0, P < 0.001), in a bad mood (OR = 7.5, P < 0.001), and occurrence of an unhappy event (OR = 18.0, P < 0.001); (2) other engagement: work engagement (OR = 40.0, P < 0.001), trip to other places (OR = 83.0, P < 0.001), and social activities (OR = 10.0, P = 0.012); (3) interpersonal relationship: conflicts with family (OR = 19.0, P = 0.004); and (4) structural situational factors: financial difficulty (OR = 19.0, P = 0.004) and worrying about police arrest (OR = 12.0, P = 0.003). Other factors such as interaction with drug users and heroin use were marginally significant, while reduced methadone dosage was nonsignificant. Interventions to improve MMT adherence need to consider situation-specific factors. Ancillary psychosocial services should be integrated with current MMT; MMT should also provide more flexible services to the clients. Furthermore, efforts should be taken to build up interdisciplinary teams and to connect with MMT in order to provide holistic harm reduction, rehabilitation, and health care.
    AIDS Care 04/2014; DOI:10.1080/09540121.2014.906552 · 1.60 Impact Factor
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    ABSTRACT: Few studies compared HIV-related risk behaviors between cities with different sociocultural environments among men who have sex with men (MSM). This study investigated the prevalence of unprotected anal intercourse (UAI) and associated individual and socio-cultural factors among Chinese MSM in Hong Kong and Shenzhen in Mainland China, which were proximal to each other but experienced different socioeconomic developments. Amongst all the 535 participants, 40.2% had had UAI. Significant factors of UAI among Shenzhen MSM included being able to find someone to share one's sexual orientation, disclosure of sexual orientation to family members, HIV risk perception, and use of alcohol or substances (adjusted OR ranged from 2.37 to 4.91), whilst disclosure of sexual orientation to family members was the only significant factor among Hong Kong MSM (adjusted OR = 1.64). Geographic variations in factors associated with UAI were observed. Future research and interventions need to take this into account.
    BioMed Research International 03/2014; 2014:970975. DOI:10.1155/2014/970975 · 2.71 Impact Factor
  • Joseph T F Lau, Jinghua Li, K C Choi, Jing Gu
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    ABSTRACT: Chinese monogamous women may contract sexually transmitted diseases (STD) from their sole male sex partner, but these women do not have high self-efficacy in negotiating about condom use with their regular sex partners. We aim to investigate the relative efficacy of a theory-based and clinic-based cognitive behavioral intervention versus a control intervention in increasing prevalence of condom use with their male sex partner among Chinese monogamous female sexually transmitted disease patients. A randomized controlled trial (RCT) was conducted. Participants were randomly allocated into the intervention group (n = 88) or the control group (n = 88). All participants were phone interviewed at baseline and at 2 and 3 months after completion of the baseline survey. The three-session group intervention was based on the information-motivation-behavioral skills (IMB) model. Participants of the control group were provided with educational pamphlets. The primary outcome was consistent condom use in the last month. Relative risks were calculated, and multiple logistic regression models were fit. As compared to the control group, the intervention group reported higher prevalence of consistent condom use with the sole male sex partner in the last month at month 2 (75.3 versus 59.8 %, RR = 1.26, 95 % CI = 1.01, 1.57) and month 3 (77.8 versus 54.6 %, RR = 1.42, 95 % CI = 1.13, 1.80), whilst the baseline between-group difference was statistically non-significant. Some other secondary outcomes such as "intention to request condom use in the next month even if the sexual partner dislikes using condoms" were also statistically significant. Furthermore, the majority (94 %) of the intervention group members were satisfied with the intervention. The theory-based intervention is potentially efficacious, but the follow-up period was relatively short. Large-scale randomized clinical trials and subsequent translational research are greatly warranted in the future.
    International Journal of Behavioral Medicine 02/2014; 21(4). DOI:10.1007/s12529-014-9388-4 · 2.63 Impact Factor
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    ABSTRACT: To establish Down syndrome (DS)-specific growth charts for Hong Kong Chinese children. Growth data were collected from (1) members of the Hong Kong Down Syndrome Association (cross-sectional); (2) DS children attending special schools or living in residential homes (cross-sectional); and (3) the paediatric departments of seven public hospitals (retrospective). 425 DS children (57% males and 43% females) born in 1977-2000, yielding 4987 observations. The LMS method was used to construct reference centile curves of weight, height, body mass index (BMI) from birth until 14 years and head circumference for the first 4 years. The median birth length was 49.8 cm and height at age 14 was 146.7 cm for DS boys. Corresponding figures for DS girls were 49.5 and 142.1 cm. The median birth weight was 3.0 kg for DS boys and 2.9 kg for DS girls. At age 14, 26% DS boys (BMI >22.6 kg/m(2)) and 12% DS girls (BMI >23.3 kg/m(2)) were overweight. The median head circumference at birth was 32.8 cm for boys and 32.0 cm for girls. Chinese DS children had a shorter stature, lower weight and tendency to be overweight than local non-DS children. Their growth patterns differed from those of Chinese DS children in Taiwan, and DS children in the USA and Sweden. Growth retardation was most salient during the first year of life.
    Archives of Disease in Childhood 01/2014; 99(9). DOI:10.1136/archdischild-2013-304494 · 2.91 Impact Factor
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    ABSTRACT: Condom use is often equated to safer sex. The prevalence of condom use during sex work among female sex workers (FSW) in China is high. Condom use, however, co-exists with condom failure and improper use and hence risk of HIV transmission. In a cross-sectional study, we interviewed 195 FSW in Shenzhen, China. The prevalence of condom use in the last episode of sex work was 97.4 %, However, respectively 53.8 and 86.2 % had experienced at least one condition of condom failure that may lead to genital contact (wearing condoms after penetration, condom breakage/slippage, condoms removed by clients) and at least one condition of improper condom use (not removing air from the tip of the condom, not pulling it down to the root of penis and not choosing good quality condoms). Factors of individual level (e.g. never choosing high quality condoms for sex work), inter-personal level (e.g. agreement to have unprotected sex if fond of clients or paid more) and environmental/structural level (e.g. non-availability of condoms) were associated with various types of condom failure and improper use. Although HIV prevention interventions have increased prevalence of condom use among FSW, the risk of HIV transmission may still be high as "unsafe" sex due to condom failure and improper use is prevalent. Interventions promoting safer sex need to address such issues and take socio-ecological factors into account. Condom use during sex work is not equivalent to well protected sex as the protective effects could be compromised by frequent condom failure and improper use.
    AIDS and Behavior 01/2014; 18(10). DOI:10.1007/s10461-013-0690-y · 3.49 Impact Factor
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    ABSTRACT: Purpose of Review. Numerous studies reported the rapid spread of HIV/AIDS epidemic among men who have sex with men (MSM) in China. This paper aims to investigate the overall epidemic trend and associated high-risk behaviours among Chinese MSM and to explore the governmental and community responses to the epidemic. Recent Findings. HIV prevalence among Chinese MSM increased rapidly in all Chinese regions in the past decade and disproportionally affected the Southwest China. In addition to the high-risk homosexual behaviours, overlapping bisexual, commercial, and drug use behaviours are commonly observed among Chinese MSM. The Chinese government has significantly expanded the surveillance efforts among MSM over the past decade. Community responses against HIV have been substantially strengthened with the support of international aid. However, lack of enabling legal and financial environment undermines the role of community-based organisations (CBOs) in HIV surveillance and prevention. Conclusion. HIV continues to spread rapidly among MSM in China. The hidden nature of MSM and the overlapping homosexual, bisexual, and commercial behaviours remain a challenge for HIV prevention among MSM. Strong collaboration between the government and CBOs and innovative intervention approaches are essential for effective HIV surveillance and prevention among MSM in China.
    01/2014; 2014:607261. DOI:10.1155/2014/607261
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    ABSTRACT: Spirometric testing is traditionally achievable in children of school-age and beyond. Incorporation of interactive incentives motivates preschool children to facilitate measurement of forced expiratory indices. Validated spirometric reference standards are available for Caucasian preschoolers but lacking in Asians. We established spirometric references in Chinese children aged 2-7 years, who were recruited from 19 randomly selected nurseries and kindergartens in Hong Kong. Parents completed International Study of Asthma and Allergies in Childhood questionnaire, and children concurrently performed incentive spirometry on-site according to international guideline. Prediction equations for spirometric indices were formulated by linear regression. One thousand four hundred two (72.9%) of 1,922 consented children, with mean (SD) age 4.4 (1.0) years, successfully performed spirometry. Following exclusions due to medical and technical reasons, 895 (63.8%) children contributed spirometric data to our references. Girls had lower FEV(0.5) , FEV(0.75) , FEV(1) , FVC, and PEF but similar FEF(25-75) than boys, adjusted for age, weight, and standing height as covariates. Standing height was the most important predictor for FEV(0.5) , FEV(0.75) , FEV(1) , FVC, and PEF in both boys (adjusted R(2) 0.525-0.734) and girls (adjusted R(2) 0.583-0.721), whereas the best prediction model for both gender is formed by standing height, weight, and age. At various standing heights, our preschoolers had FEV(1) Z-scores 0.13-1.00 higher than those of collaborative Caucasian reference. This study justifies the need for ethnic-specific reference equations and presents spirometry references in young Chinese children. Their forced expiratory indices are determined by gender, age, weight and standing height, and standing height is the best anthropometric index to predict all spirometric indices. Pediatr Pulmonol. © 2013 Wiley Periodicals, Inc.
    Pediatric Pulmonology 11/2013; 48(11). DOI:10.1002/ppul.22773 · 2.38 Impact Factor
  • Joseph T F Lau, Jing Gu, Hi Yi Tsui, Zixin Wang
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    ABSTRACT: We investigated the prevalence and associated factors of men have sex with men (MSM) who had never participated in HIV voluntary counseling and testing (VCT) but intended to do so in the next six months. An anonymous cross-sectional survey interviewed 577 MSM in Hong Kong, China, face-to-face or through an electronic questionnaire. We identified 245 MSM who had never participated in VCT (never-testers), among whom 12.7% intended to do so in the next six months. Factors associated positively with high behavioral intention were: 1) perceived necessity to participate in HIV test regularly (ORm=4.54, 95%CI: 1.30-15.83), 2) perception that >20% of the local MSM had participated in VCT (ORm=17.86, 95%CI: 1.89-169.08) and 3) perceived higher chance to have sex with PLWH in the next six months (ORm=2.92, 95%CI: 1.08-7.93). Negatively associated factors were: local residency (ORm=0.06, 95%CI: 0.01-0.34) and perceived higher chance of having UAI in the next six months (ORm=0.27, 95%CI: 0.09-0.84). In addition, no interaction term between the independent variable and UAI status was found to be statistically significant. Many sampled never-testers had low intention to take up VCT and were in the pre-contemplation stage of the Transtheoretical Model. Stage-matched promotions are warranted.
    Preventive Medicine 09/2013; 57(6). DOI:10.1016/j.ypmed.2013.09.005 · 2.93 Impact Factor

Publication Stats

5k Citations
649.44 Total Impact Points


  • 1993–2015
    • The Chinese University of Hong Kong
      • • Faculty of Medicine
      • • The Jockey Club School of Public Health and Primary Care
      • • Department of Public Health
      • • Prince of Wales Hospital
      • • Department of Obstetrics and Gynaecology
      • • Center for Clinical Trials and Epidemiological Research
      Hong Kong, Hong Kong
  • 2010–2014
    • Sun Yat-Sen University
      • • School of Public Health
      • • Department of Sociology (School of Sociology and Anthropology)
      • • Department of Anthropology
      Shengcheng, Guangdong, China
  • 2013
    • Jiangsu Provincial Center for Disease Control and Prevention
      Chiang-tu, Jiangsu Sheng, China
  • 2002–2013
    • Prince of Wales Hospital, Hong Kong
      Chiu-lung, Kowloon City, Hong Kong
  • 2008
    • Alice Ho Miu Ling Nethersole Hospital
      Ch’üan-wan, Tsuen Wan, Hong Kong
  • 2007
    • The University of Hong Kong
      Hong Kong, Hong Kong
  • 1995
    • Oxford University Hospitals NHS Trust
      Oxford, England, United Kingdom