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Table 2 Pregnancy alcohol exposure patterns three months before pregnancy and during pregnancy

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

  Alcohol drinking level in 3 months prior to pregnancya
  None Low Moderate High Binge  
  N (%) N (%) N (%) N (%) N (%) Total N (%)
PAE tier 1       
 Abstinent throughout pregnancy 261 (90.0) 82 (41.6) 79 (27.4) 3 (6.4) 69 (12.3) 494 (35.7)
 Drank alcohol while pregnant 29 (10.0) 115 (58.4) 209 (72.6) 44 (93.6) 494 (87.7) 891 (64.3)
 Total 290 (100.0) 197 (100.0) 288 (100.0) 47 (100.0) 563 (100.0) 1385 (100.0)
PAE tier 2       
 Abstinent throughout pregnancy 261 (90.0) 82 (41.6) 79 (27.4) 3 (6.4) 69 (12.3) 494 (35.7)
 Drank alcohol in trimester one only 22 (7.6) 64 (32.5) 119 (41.3) 15 (32.9) 210 (37.3) 430 (31.1)
 Drank alcohol throughout pregnancy 7 (2.4) 51 (25.9) 90 (31.6) 29 (61.7) 284 (50.4) 461 (33.3)
 Total 290 (100.0) 197 (100.0) 288 (100.0) 47 (100.0) 563 (100.0) 1385 (100.0)
PAE tier 3       
 Abstinent throughout pregnancy 261 (90.0) 82 (41.6) 79 (27.4) 3 (6.4) 69 (12.3) 494 (35.7)
 Low in T1, abstinent in T2 and T3 12 (4.4) 56 (28.4) 33 (11.5) 5 (10.6) 36 (6.4) 142 (10.3)
 Moderate/high in T1, abstinent in T2 and T3 6 (2.1) 5 (2.5) 72 (25.0) 9 (19.1) 78 (13.8) 170 (12.2)
 Binge pre-aware, abstinent in T2 and T3 4 (1.4) 3 (1.5) 14 (4.9) 1 (2.1) 96 (17.0) 118 (8.5)
 Low in T1, low/moderate in T2 and/or T3 4 (1.4) 46 (23.3) 31 (10.8) 4 (8.5) 27 (4.8) 112 (8.1)
 Moderate/high in T1, any level in T2 and/or T3 1 (0.3) 3 (1.5) 53 (18.4) 21 (44.7) 107 (19.0) 185 (13.4)
 Binge pre-aware, low/moderate in T2 and/or T3 2 (0.7) 2 (1.0) 6 (2.1) 4 (8.5) 150 (26.6) 164 (11.8)
 Total 290 (100.0) 197 (100.0) 288 (100.0) 47 (100.0) 563 (100.0) 1385 (100.0)
  1. aTotal excludes lifetime abstainers (n = 112) and 73 with irregular patterns, final n = 1385. Due to low numbers in the high level PAE, this category was combined with moderate PAE
  2. T1, T2, T3: Trimesters 1, 2 and 3