Lap Po Lam’s research while affiliated with Princess Margaret Hospital, Hong Kong and other places

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Publications (1)


Figure 1: Distribution of pregnant women admitting and denying current drug use (y axis) versus the total DAST-10 score (x-axis) for the detection of illicit drug use among pregnant women.
Figure 2: The ROC curve for DAST-10 detection of (a) positive urinalysis for illicit drug use (AUROC = 0.73; 95% CI, 0.56–0.89; asymptotic significance P = 0.005); (b) self-reported illicit drug use (AUROC = 0.93; 95% CI, 0.83–1.00; asymptotic significance P < 0.001); and (c) evidence of illicit drug use (AUROC = 0.81; 95% CI, 0.70–0.92; asymptotic significance P < 0.001).
Figure 3: Distribution of pregnant women with and without drug use (y axis) versus the five categories of DAST-10 scores (x axis) according to the degree of problems (0: No problem; 1–2 Low level; 3–5 Moderate level; 6–8 Substantial level; 9–10 Severe level) for (a) urinalysis for illicit drug (Measure 1), (b) self-reported illicit drug use (Measure 2), and (c) evidence of drug use during pregnancy by urinalysis or self-report (Measure 3).
Table 3 . Sensitivity, specificity, positive predictive value, negative predictive values and overall accuracy of the different DAST-10 cut-off scores for detection of positive urinalysis (Measure 1).
Figure 4: A sample of the Drug Abuse Screening Test (DAST-10) Chinese Version. An English translation can be found in the Supplementary Information.
Validation of the Drug Abuse Screening Test (DAST-10): A study on illicit drug use among Chinese pregnant women
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June 2015

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Lap Po Lam

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Robert Kien Howe Chin

We assessed the Chinese version of the Drug Abuse Screening Test (DAST-10) for identifying illicit drug use during pregnancy among Chinese population. Chinese pregnant women attending their first antenatal visit or their first unbooked visit to the maternity ward were recruited during a 4-month study period in 2011. The participants completed self-administered questionnaires on demographic information, a single question on illicit drug use during pregnancy and the DAST-10. Urine samples screened positive by the urine Point-of-Care Test were confirmed by gas chromatography-mass spectrometry. DAST-10 performance was compared with three different gold standards: urinalysis, self-reported drug use, and evidence of drug use by urinalysis or self-report. 1214 Chinese pregnant women participated in the study and 1085 complete DAST-10 forms were collected. Women who had used illicit drugs had significantly different DAST-10 scores than those who had not. The sensitivity of DAST-10 for identify illicit drug use in pregnant women ranged from 79.2% to 33.3% and specificity ranged from 67.7% to 99.7% using cut-off scores from ≥1 to ≥3. The ~80% sensitivity of DAST-10 using a cut-off score of ≥1 should be sufficient for screening of illicit drug use in Chinese pregnant women, but validation tests for drug use are needed.

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Citations (1)


... The three instruments, including DAST-10, DSQ, and SCID-DD have already been translated into Chinese versions (Lam et al., 2015; This document is copyrighted by the American Psychological Association or one of its allied publishers. ...

Reference:

Applying Computerized Adaptive Testing to the Desires for Speed Questionnaire in the Chinese Population: A Simulation Study
Validation of the Drug Abuse Screening Test (DAST-10): A study on illicit drug use among Chinese pregnant women