Table 3.
Association between Self-Reported Prenatal Drinking Prevalence among Females and Prevalence Detected by PEth and EtG (N=193). Classification Tables and Statistics.
| Quantity- Frequency of Drinking Self-report drinking history |
PEth Result | EtG Result | Positive cases on one or both biomarkers | |||
|---|---|---|---|---|---|---|
| Negative | Positive | Negative | Positive | Negative | Positive | |
| Did not drink | 53(27.5%) | 14(7.3%) | 59(30.6%) | 8 (4.1%) | 48 (24.9%) | 19 (9.8%) |
| Drank in the past 7 days | 5(2.6%) | 55(28.5%) | 21(10.9%) | 39(20.2%) | 3 (1.6%) | 57 (29.5) |
| Drank in the past 30 days | 15(7.8%) | 36(18.7%) | 32(16.6%) | 19 (9.8%) | 12 (6.2%) | 39 (4.7%) |
| Drank in the past 3 months | 10 (5.2%) | 5 (2.6%) | 6 (3.1%) | 9 (5.1%) | 5 (2.6%) | 10 (5.2%) |
| χ2=72.320, df=3, p<.001, Somer’s d=.549 (+ PEth)/(+Q-F) = 87.3% Z=3.94, p <.001 |
χ2=40.568, df=3, p<.001, Somer’s d=.382 (+ EtG)/(+Q-F) = 59.5% Z=6.78. p<.001 |
χ2=65.179, df=4, p<.001, Somer’s d=.517 (+ by 1 or both/ + by Q-F) =99.2% Z=0.825, p=.409 |
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Note: Symmetric form of Somer’s d