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Table 3 Relationship between early maternal age at onset of drinking and first intoxication and pregnancy alcohol consumption patterns

From: “Did you ever drink more?” A detailed description of pregnant women’s drinking patterns

  Age at drinking regularlya   Age first intoxicatedb  
  > = 18 yrs <18 yrs p chi2c > = 18 yrs <18 yrs P chi2c
Total number of participants 626 (%) 489 (%)   554 (%) 651 (%)  
Abstinent throughout pregnancy 181 (28.9) 133 (27.2) Reference 211 (38.1) 164 (25.2) Reference
PAE tier 1       
Drank alcohol while pregnant 445 (71.1) 356 (72.8) 0.53 343 (61.9) 487 (74.8) <0.001
PAE tier 2       
Drank alcohol in trimester one only 220 (35.1) 150 (30.7) 0.63 186 (33.6) 196 (30.1) 0.04
Drank alcohol throughout pregnancy 225 (35.9) 206 (42.1) 0.14 157 (28.3) 291 (44.7) <0.001
PAE tier 3       
Low in T1, abstinent in T2 and T3 68 (10.9) 37 (7.6) 0.20 59 (10.6) 52 (8.0) 0.56
Moderate/high in T1, abstinent in T2 and T3 86 (13.7) 68 (13.9) 0.71 76 (13.7) 78 (12.0) 0.15
Binge preaware, abstinent in T2 and T3 66 (10.5) 45 (9.2) 0.74 51 (9.2) 66 (10.1) 0.02
Low in T1, low/moderate in T2 and/or T3 58 (9.3) 37 (7.6) 0.56 57 (10.3) 47 (7.2) 0.79
Moderate/high in T1, any level in T2 and/or T3 92 (14.7) 83 (17.0 0.28 64 (11.6) 117 (18.0) <0.001
Binge pre-aware, low/moderate in T2 and/or T3 75 (12.0) 86 (17.6) 0.02 36 (6.5) 127 (19.5) <0.001
  1. amissing data on 270 (19.5 %)
  2. bmissing data on 180 (13.0 %). Approx 67 % of missing data was amongst the women abstaining in pregnancy
  3. cPearson chi square, p value
  4. T1, T2, T3: Trimesters 1, 2 and 3