Log linear binomial regression for risk of alcohol during pregnancy
| GUI n=10 953 | SCOPE Ireland n=1766 | PRAMS n=718 | |
|---|---|---|---|
| Adjusted RR (95% CI) | Adjusted RR (95% CI) | Adjusted RR (95% CI) | |
| Age (years) | |||
| <20 | 0.48 (0.30 to 0.77) | 0.92 (0.85 to 1.00) | 1.31 (0.42 to 4.14) |
| 20–24 | 0.56 (0.46 to 0.68) | 0.84 (0.71 to 0.99) | 0.26 (0.09 to 0.77) |
| 25–29 | 0.69 (0.62 to 0.78) | 0.95 (0.91 to 1.00) | 0.84 (0.66 to 1.08) |
| 30–39 | Reference | Reference | Reference |
| >40 | 1.18 (1.04 to 1.35) | 0.86 (0.66 to 1.10) | 0.97 (0.67 to 1.39) |
| Education* | |||
| Secondary | 0.65 (0.60 to 0.72) | 0.94 (0.88 to 1.01) | 0.81 (0.62 to 1.07) |
| Tertiary | Reference | Reference | Reference |
| Ethnicity | |||
| Caucasian | Reference | Reference | Reference |
| Other | 0.27 (0.19 to 0.37) | 0.34 (0.20 to 0.56) | 0.31 (0.11 to 0.88) |
| Marital status | |||
| Married | Reference | Reference | Reference |
| Single | 1.05 (0.96 to 1.17) | 1.09 (1.02 to 1.17) | 0.98 (0.65 to 1.47) |
| Parity | |||
| 0 | Reference | – | Reference |
| 1+ | 0.90 (0.83 to 0.98) | – | 1.02 (0.86 to 1.21) |
| Smoking | |||
| Yes | 1.50 (1.36 to 1.65) | 1.17 (1.12 to 1.22) | 1.42 (1.18 to 1.70) |
| No | Reference | Reference | Reference |
| BMI (kg/m2) | |||
| <18.5 | 1.01 (0.79 to 1.29) | 1.06 (0.86 to 1.30) | 0.80 (0.46 to 1.41) |
| 18.5–24.99 | 0.98 (0.90 to 1.07) | 1.02 (0.97 to 1.07) | 0.96 (0.78 to 1.18) |
| 25.0–29.9 | Reference | Reference | Reference |
| >30 | 0.84 (0.74 to 0.94) | 0.96 (0.89 to 1.04) | 0.89 (0.63 to 1.27) |
| Low birth weight (<2500 g) | |||
| No | Reference | Reference | Reference |
| Yes | 0.76 (0.60 to 0.96) | 1.01 (0.89 to 1.14) | 0.66 (0.36 to 1.22) |
| Preterm birth (<37 weeks gestation) | |||
| No | Reference | Reference | Reference |
| Yes | 0.91 (0.74 to 1.12) | 0.94 (0.83 to 1.07) | 0.97 (0.56 to 1.66) |
Log linear binomial regression was used to examine the characteristics associated with alcohol consumption in each cohort and adjusted for all variables in table.
*Secondary includes all education up to university or post school institutions. Tertiary includes any tertiary education at a university or other post school institution.
BMI, body mass index; GUI, Growing up in Ireland; PRAMS, Pregnancy Risk Assessment Monitoring System; SCOPE, Screening for Pregnancy Endpoints.