Zhaoyu Gan

Sun Yat-Sen University of Medical Sciences, Shengcheng, Guangdong, China

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Publications (17)59.26 Total impact

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    ABSTRACT: Phobic fears are common in the general population and among individuals with major depression (MD). We know little about the prevalence, clinical correlates, and structure of phobic fears in Chinese women with MD. We assessed 22 phobic fears in 6017 Han Chinese women with MD. We used exploratory factor analysis to examine the structure of these phobic fears. We examined the relationship between individual phobic fears and the severity of MD, neuroticism, comorbid panic disorder, generalized anxiety disorder and dysthymia using logistic regression models. The frequency of phobic fears ranged from 3.0% (eating in public) to 36.0% (snakes). Phobic fears were significantly associated with more severe MD, high neuroticism, and co-morbid panic disorder, generalized anxiety disorder and dysthymia. Our factor analysis suggested four underlying subgroups of phobic fears which differed in their clinical correlates, severity and patterns of comorbidity. Data were collected retrospectively through interview and recall bias may have affected the results. Phobic fears are correlated with comorbid MD and more severe MD. These phobic fears clearly subdivide into four subgroups that differ meaningfully from each other.
    Journal of affective disorders 03/2014; 157:92-9. · 3.76 Impact Factor
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    ABSTRACT: The relationship between age at onset (AAO) and major depression (MD) has been studied in US, European and Chinese populations. However, larger sample studies are needed to replicate and extend earlier findings. We re-examined the relationship between AAO and the clinical features of recurrent MD in Han Chinese women by analyzing the phase I (N=1848), phase II (N=4169) and total combined data (N=6017) from the CONVERGE project. Linear, logistic, multiple linear and multinomial logistic regression models were used to determine the association of AAO with continuous, binary and categorical variables. The effect size of the association between AAO and clinical features of MD was quite similar in the phase I and phase II samples. These results confirmed that MD patients with earlier AAO tended to suffer more severe, recurrent and chronic illness and cases of MD with earlier AAO showed increased neuroticism, greater family history and psychiatric comorbidity. In addition, we showed that earlier AAO of MD in Han Chinese women was associated with premenstrual symptoms, postnatal depression, a highly authoritarian or cold childhood parental rearing style and a reduced probability for having melancholia. Data were collected retrospectively through interview and recall bias may have affected the results. MD with earlier AAO in Han Chinese women shows a distinct set of clinical features which are similar to those reported in Western populations.
    Journal of affective disorders 03/2014; 157:72-9. · 3.76 Impact Factor
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    ABSTRACT: The Brief Index of Sexual Functioning for Women (BISF-W) is proved to be a useful instrument to assess female sexual function, but the validation information of its Chinese version is still unavailable. It has not been used to assess female sexual function among Han Chinese women with recurrent depression. This study aims to validate the Chinese version of BISF-W (C-BISF-W) with a new scoring algorithm and evaluate the impact of recurrent depression on sexual function among Han Chinese women. Three groups of subjects, 63 unmedicated patients with recurrent depression, 50 medicated remitted patients with recurrent depression, and 92 healthy controls were enrolled in this study. Sexual function was assessed with C-BISF-W. A new scoring algorithm was developed to provide an overall composite score (G) and seven dimension scores: desire (D1), arousal (D2), frequency of sexual activity (D3), orgasm (D4), sexual interaction (D5), relationship dissatisfaction (D6), and problems affecting sexual function (D7). Psychometric analyses were conducted. Four factors whose Eigenvalues were higher than 1 were extracted, explaining 61.426% of the total variance. Compared with healthy age-matched control, unmedicated cases scored significantly lower in G, D1, D2, D3, D4 and D5, whereas these were higher in D6 and D7. No significant difference was found in the scores of G, D1, D2, D3, D4, and D5 between remitted cases and control, but the former scored higher in D6 and D7 than the latter. In comparison with unmedicated cases, medicated remitted cases got a higher score in G, D1, D2, and D5. For the healthy control, sexual function (G) was negatively correlated with age. With the new scoring algorithm, C-BISF-W is proved to be a validated instrument to assess female sexual function. The impact of recurrent depression on female sexual function is negatively profound and extensive. Han Z, Gan Z, Han H, Chen J, Li K, and Guan N. Validity of the Chinese version of the Brief Index of Sexual Functioning for Women with a new scoring algorithm and comparison of normative and recurrently depressed Han Chinese population. J Sex Med **;**:**-**.
    Journal of Sexual Medicine 12/2013; · 3.51 Impact Factor
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    ABSTRACT: This study was designed to explore the relationship between pituitary microadenoma and psychosis and to evaluate the role that prolactin plays in pituitary microadenoma and comorbid psychosis. In this study, the prolactin serum levels were compared between 74 first-episode drug-naive patients with a pituitary microadenoma with psychosis (PMP), and 58 patients with a pituitary microadenoma with no psychosis (PMNP). Patients with PMP had significantly higher prolactin serum levels; male patients with PMP had a mean [S.D.] prolactin level of 705.4uIU/ml [226.1] vs. 433.1uIU/ml [58.4] for male patients with PMNP, while female patients with PMP had a mean prolactin level of 1890.1uIU/ml [1138.7] vs. 978.6uIU/ml [657.9] for female patients with PMNP. The size of microadenoma in the patients with PMP was larger than those in the patients with PMNP, regardless of sex. Our data suggested that a higher prolactin serum level is a characteristic of first-episode neuroleptic-naive patients with PMP.
    Psychiatry research. 07/2013;
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    ABSTRACT: BACKGROUND: The relationship between recurrent major depression (MD) in women and suicidality is complex. We investigated the extent to which patients who suffered with various forms of suicidal symptomatology can be distinguished from those subjects without such symptoms.Method We examined the clinical features of the worst episode in 1970 Han Chinese women with recurrent DSM-IV MD between the ages of 30 and 60 years from across China. Student's t tests, and logistic and multiple logistic regression models were used to determine the association between suicidality and other clinical features of MD. RESULTS: Suicidal symptomatology is significantly associated with a more severe form of MD, as indexed by both the number of episodes and number of MD symptoms. Patients reporting suicidal thoughts, plans or attempts experienced a significantly greater number of stressful life events. The depressive symptom most strongly associated with lifetime suicide attempt was feelings of worthlessness (odds ratio 4.25, 95% confidence interval 2.9-6.3). Excessive guilt, diminished concentration and impaired decision-making were also significantly associated with a suicide attempt. CONCLUSIONS: This study contributes to the existing literature on risk factors for suicidal symptomatology in depressed women. Identifying specific depressive symptoms and co-morbid psychiatric disorders may help improve the clinical assessment of suicide risk in depressed patients. These findings could be helpful in identifying those who need more intense treatment strategies in order to prevent suicide.
    Psychological Medicine 04/2012; · 5.59 Impact Factor
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    ABSTRACT: Schizophrenia is thought to arise in part from abnormal gray matter (GM), which are partly shared by the relatives of the probands. DISC1 is one of the most promising susceptibility genes of schizophrenia and a SNP rs821597 (A) in the gene was associated with schizophrenia in Han Chinese population. In this study, 61 healthy controls and 72 with schizophrenic patients were genotyped at rs821597, and underwent T1-weighted MRI for the density of GM. The results showed that the risk allele (A) carriers had higher GM density in regional left parahippocampal gyrus and right orbitofrontal cortex in schizophrenic patients, but had reduced GM density of these brain regions in healthy controls. The DISC1 variant rs821597 may confer risk for schizophrenia by its effects on the regional GM in left parahippocampal gyrus and right orbitofrontal cortex with other risk factors for schizophrenia.
    Neuroscience Letters 04/2012; 517(1):21-4. · 2.03 Impact Factor
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    ABSTRACT: `The single-nucleotide polymorphism rs1344706 located in the ZNF804A zinc finger protein 804A gene is a well-established genome-wide significant variant for schizophrenia. The aim of this study was to investigate the potential association between this ZNF804A polymorphism and treatment response to atypical antipsychotic. Seventy-one first-episode inpatients with schizophrenia receiving olanzapine, aripiprazole, or quetiapine monotherapy were enrolled. Symptom response to treatment was assessed using the Positive and Negative Syndrome Scale (PANSS) on admission and reassessed after 4 weeks of treatment. Single-nucleotide polymorphism rs1344706 was genotyped by direct sequencing. There was substantial difference in treatment response among patients with 3 different genotypes regarding total PANSS score and positive subscore (for total PANSS score, F = 4.608, df = 2, P = .013; for positive subscore, F = 4.183, df = 2, P = .019). Compared with G homozygotes, T carriers showed significantly less improvement in total PANSS score as well as positive subscore (for total PANSS score, F = 8.724, df = 1, P = .004; for positive subscore, F = 9.392, df = 1, P = .005). Our results suggest that ZNF80A rs1344706 polymorphism may play a role in treatment response to atypical antipsychotic, although replication is required to confirm this finding.
    Comprehensive psychiatry 03/2012; 53(7):1044-8. · 2.08 Impact Factor
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    ABSTRACT: The Mood Disorder Questionnaire (MDQ) is a well-recognized screening tool for bipolar disorder, but its Chinese version needs further validation. This study aims to measure the accuracy of the Chinese version of the MDQ as a screening instrument for bipolar disorder (BPD) in a group of patients with a current major depressive episode. 142 consecutive patients with an initial DSM-IV-TR diagnosis of a major depressive episode were screened for BPD using the Chinese translation of the MDQ and followed up for one year. The final diagnosis, determined by a special committee consisting of three trained senior psychiatrists, was used as a 'gold standard' and ROC was plotted to evaluate the performance of the MDQ. The optimal cut-off was chosen by maximizing the Younden's index. Of the 142 patients, 122 (85.9%) finished the one year follow-up. On the basis of a semi-structured clinical interview 48.4% (59/122) received a diagnosis of unipolar depression (UPD), 36.9% (45/122) BPDII and 14.8% (18/122) BPDI. At the end of the one year follow-up,9 moved from UPD to BPD, 2 from BPDII to UPD, 1 from BPDII to BPDI, the overall rate of initial misdiagnosis was 16.4%. MDQ showed a good accuracy for BPD: the optimal cut-off was 4, with a sensitivity of 0.72 and a specificity of 0.73. When BPDII and BPDI were calculated independently, the optimal cut-off for BPDII was 4, with a sensitivity of 0.70 and a specificity of 0.73; while the optimal cut-off for BPDI was 5, with a sensitivity of 0.67 and a specificity of 0.86. Our results show that the Chinese version of MDQ is a valid tool for screening BPD in a group of patients with current depressive episode on the Chinese mainland.
    BMC Psychiatry 01/2012; 12:8. · 2.23 Impact Factor
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    ABSTRACT: Although the diagnosis of melancholia has had a long history, the validity of the current DSM-IV definition remains contentious. We report here the first detailed comparison of melancholic and nonmelancholic major depression (MD) in a Chinese population examining in particular whether these two forms of MD differ quantitatively or qualitatively. DSM-IV criteria for melancholia were applied to 1,970 Han Chinese women with recurrent MD recruited from 53 provincial mental health centers and psychiatric departments of general medical hospitals in 41 cities. Statistical analyses, utilizing Student's t-tests and Pearson's χ(2) , were calculated using SPSS 13.0. Melancholic patients with MD were distinguished from nonmelancholic by being older, having a later age at onset, more episodes of illness and meeting more A criteria. They also had higher levels of neuroticism and rates of lifetime generalized anxiety disorder, panic disorder, and social and agoraphobia. They had significantly lower rates of childhood sexual abuse but did not differ on other stressful life events or rates of MD in their families. Consistent with most prior findings in European and US populations, we find that melancholia is a more clinically severe syndrome than nonmelancholic depression with higher rates of comorbidity. The evidence that it is a more "biological" or qualitatively distinct syndrome, however, is mixed.
    Depression and Anxiety 11/2011; 29(1):4-9. · 4.61 Impact Factor
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    ABSTRACT: A number of clinical features potentially reflect an individual's familial vulnerability to major depression (MD), including early age at onset, recurrence, impairment, episode duration, and the number and pattern of depressive symptoms. However, these results are drawn from studies that have exclusively examined individuals from a European ethnic background. We investigated which clinical features of depressive illness index familial vulnerability in Han Chinese females with MD. We used lifetime MD and associated clinical features assessed at personal interview in 1,970 Han Chinese women with DSM-IV MD between 30-60 years of age. Odds Ratios were calculated by logistic regression. Individuals with a high familial risk for MD are characterized by severe episodes of MD without known precipitants (such as stress life events) and are less likely to feel irritable/angry or anxious/nervous. The association between family history of MD and the lack of a precipitating stressor, traditionally a characteristic of endogenous or biological depression, may reflect the association seen in other samples between recurrent MD and a positive family history. The symptomatic associations we have seen may reflect a familial predisposition to other dimensions of psychopathology, such as externalizing disorders or anxiety states.
    Depression and Anxiety 11/2011; 29(1):10-5. · 4.61 Impact Factor
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    ABSTRACT: BACKGROUND: Studies in Western countries have repeatedly shown that women with a history of childhood sexual abuse (CSA) are at increased risk for developing major depression (MD). Would this relationship be found in China?MethodThree levels of CSA (non-genital, genital, and intercourse) were assessed by self-report in two groups of Han Chinese women: 1970 clinically ascertained with recurrent MD and 2597 matched controls. Diagnostic and other risk factor information was assessed at personal interview. Odds ratios (ORs) were calculated by logistic regression and regression coefficients by linear or Poisson regression. RESULTS: Any form of CSA was significantly associated with recurrent MD [OR 3.26, 95% confidence interval (CI) 1.95-5.45]. This association strengthened with increasing CSA severity: non-genital (OR 2.47, 95% CI 1.17-5.23), genital (OR 2.77, 95% CI 1.32-5.83) and intercourse (OR 13.35, 95% CI 1.83-97.42). The association between any form of CSA and MD remained significant after accounting for parental history of depression, childhood emotional neglect (CEN), childhood physical abuse (CPA) and parent-child relationship. Among the depressed women, those with CSA had an earlier age of onset, longer depressive episodes and an increased risk for generalized anxiety disorder (GAD; OR 1.92, 95% CI 1.39-2.66) and dysthymia (OR 2.16, 95% CI 1.52-3.09). CONCLUSIONS: In Chinese women CSA is strongly associated with MD and this association increases with greater severity of CSA. Depressed women with CSA have an earlier age of onset, longer depressive episodes and increased co-morbidity with GAD and dysthymia. Although reporting biases cannot be ruled out, our results are consistent with the hypothesis that, as in Western countries, CSA substantially increases the risk for MD in China.
    Psychological Medicine 08/2011; · 5.59 Impact Factor
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    ABSTRACT: Years of education are inversely related to the prevalence of major depressive disorder (MDD), but the relationship between the clinical features of MDD and educational status is poorly understood. We investigated this in 1970 Chinese women with recurrent MDD identified in a clinical setting. Clinical and demographic features were obtained from 1970 Han Chinese women with DSM-IV major depression between 30 and 60 years of age across China. Analysis of linear, logistic and multiple logistic regression models were used to determine the association between educational level and clinical features of MDD. Subjects with more years of education are more likely to have MDD, with an odds ratio of 1.14 for those with more than ten years. Low educational status is not associated with an increase in the number of episodes, nor with increased rates of co-morbidity with anxiety disorders. Education impacts differentially on the symptoms of depression: lower educational attainment is associated with more biological symptoms and increased suicidal ideation and plans to commit suicide. Findings may not generalize to males or to other patient populations. Since the threshold for treatment seeking differs as a function of education there may an ascertainment bias in the sample. The relationship between symptoms of MDD and educational status in Chinese women is unexpectedly complex. Our findings are inconsistent with the simple hypothesis from European and US reports that low levels of educational attainment increase the risk and severity of MDD.
    Journal of affective disorders 08/2011; 136(3):988-92. · 3.76 Impact Factor
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    ABSTRACT: Post partum depression (PPD) is relatively common in China but its clinical characteristics and risk factors have not been studied. We set out to investigate whether known risk factors for PPD could be found in Chinese women. A case control design was used to determine the impact of known risk factors for PPD in a cohort of 1970 Chinese women with recurrent DSM-IV major depressive disorder (MDD). In a within-case design we examined the risk factors for PPD in patients with recurrent MDD. We compared the clinical features of MDD in cases with PPD to those without MDD. Odds ratios were calculated using logistic and ordinal regression. Lower occupational and educational statuses increased the risk of PPD, as did a history of pre-menstrual symptoms, stressful life events and elevated levels of the personality trait of neuroticism. Patients with PPD and MDD were more likely to experience a comorbid anxiety disorder, had a younger age of onset of MDD, have higher levels of neuroticism and dysthymia. Results obtained in this clinical sample may not be applicable to PPD within the community. Data were obtained retrospectively and we do not know whether the correlations we observe have the same causes as those operating in other populations. Our results are consistent with the hypothesis that the despite cultural differences between Chinese and Western women, the phenomenology and risk factors for PPD are very similar.
    Journal of affective disorders 08/2011; 136(3):983-7. · 3.76 Impact Factor
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    ABSTRACT: In European and US studies, patients with major depressive disorder (MDD) report more stressful life events (SLEs) than controls, but this relationship has rarely been studied in Chinese populations. Sixteen lifetime SLEs were assessed at interview in two groups of Han Chinese women: 1970 clinically ascertained with recurrent MDD and 2597 matched controls. Diagnostic and other risk factor information was assessed at personal interview. Odds ratios (ORs) were calculated by logistic regression. 60% of controls and 72% of cases reported at least one lifetime SLE. Fourteen of the sixteen SLEs occurred significantly more frequently in those with MDD (median odds ratio of 1.6). The three SLEs most strongly associated with risk for MDD (OR>3.0) preceded the onset of MDD the majority of the time: rape (82%), physical abuse (100%) and serious neglect (99%). Our results may apply to females only. SLEs were rated retrospectively and are subject to biases in recollection. We did not assess contextual information for each life event. More severe SLEs are more strongly associated with MDD. These results support the involvement of psychosocial adversity in the etiology of MDD in China.
    Journal of affective disorders 08/2011; 135(1-3):95-9. · 3.76 Impact Factor
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    ABSTRACT: Individuals with early-onset depression may be a clinically distinct group with particular symptom patterns, illness course, comorbidity and family history. This question has not been previously investigated in a Han Chinese population. We examined the clinical features of 1970 Han Chinese women with DSM-IV major depressive disorder (MDD) between 30 and 60 years of age across China. Analysis of linear, logistic and multiple logistic regression models was used to determine the association between age at onset (AAO) with continuous, binary and discrete characteristic clinical features of MDD. Earlier AAO was associated with more suicidal ideation and attempts and higher neuroticism, but fewer sleep, appetite and weight changes. Patients with an earlier AAO were more likely to suffer a chronic course (longer illness duration, more MDD episodes and longer index episode), increased rates of MDD in their parents and a lower likelihood of marriage. They tend to have higher comorbidity with anxiety disorders (general anxiety disorder, social phobia and agoraphobia) and dysthymia. Early AAO in MDD may be an index of a more severe, highly comorbid and familial disorder. Our findings indicate that the features of MDD in China are similar to those reported elsewhere in the world.
    Journal of affective disorders 07/2011; 135(1-3):89-94. · 3.76 Impact Factor
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    ABSTRACT: A correct timely diagnosis of bipolar depression remains a big challenge for clinicians. This study aimed to develop a clinical characteristic based model to predict the diagnosis of bipolar disorder among patients with current major depressive episodes. A prospective study was carried out on 344 patients with current major depressive episodes, with 268 completing 1-year follow-up. Data were collected through structured interviews. Univariate binary logistic regression was conducted to select potential predictive variables among 19 initial variables, and then multivariate binary logistic regression was performed to analyze the combination of risk factors and build a predictive model. Receiver operating characteristic (ROC) curve was plotted. Of 19 initial variables, 13 variables were preliminarily selected, and then forward stepwise exercise produced a final model consisting of 6 variables: age at first onset, maximum duration of depressive episodes, somatalgia, hypersomnia, diurnal variation of mood, irritability. The correct prediction rate of this model was 78% (95%CI: 75%-86%) and the area under the ROC curve was 0.85 (95%CI: 0.80-0.90). The cut-off point for age at first onset was 28.5 years old, while the cut-off point for maximum duration of depressive episode was 7.5 months. The limitations of this study include small sample size, relatively short follow-up period and lack of treatment information. Our predictive models based on six clinical characteristics of major depressive episodes prove to be robust and can help differentiate bipolar depression from unipolar depression.
    Journal of affective disorders 06/2011; 134(1-3):119-25. · 3.76 Impact Factor
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    ABSTRACT: Concurrence of psychosis and Dandy-Walker complex (DWC) has been reported in some medical literature. Here, we reported four patients with concurrent psychosis and DWC of all four subtypes. Some clinical features found were juvenile or young adult age onset, high frequency of family history of psychosis, atypical psychotic symptoms, and high prevalence of cognitive deficit and refractoriness to treatment, in line with the cases in previous reports. These findings might help further illuminate the role that the cerebellum plays in the etiology of schizophrenia or bipolar disorder.
    General hospital psychiatry 01/2011; 34(1):102.e7-102.e11. · 2.67 Impact Factor

Publication Stats

37 Citations
10 Downloads
1k Views
59.26 Total Impact Points

Institutions

  • 2011–2013
    • Sun Yat-Sen University of Medical Sciences
      Shengcheng, Guangdong, China
    • Sun Yat-Sen University
      • Department of Radiology
      Guangzhou, Guangdong Sheng, China