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Table 1 Baseline characteristics of the subjects (N = 1325)

From: Evaluation of childhood traumatic experience as a risk factor for alcohol use disorder in adulthood

  Infant exposure group Prenatal exposure group No exposure group Test value P
N   374 399 552   
Gender (%) Male 317(84.8) 348(87.2) 475(86.1) 0.786 0.675
Female 57(15.2) 51(12.8) 77(13.9)   
Age (year)   39.5 ± 0.6 38.5 ± 0.8 37.5 ± 0.9 931.979 <0.001
Education (%) Illiterate and primary school 9(2.4) 8(2.0) 6(1.1) 12.597 0.05
Junior high school 70(18.7) 64(16.0) 73(13.2)   
High school / secondary school 197(52.7) 221(55.4) 289(52.4)   
College and above 98(26.2) 106(26.6) 184(33.3)   
Marital status (%) Unmarried 4(1.1) 7(1.8) 3(0.5) 2.976 0.812
Married 351(93.9) 378(94.7) 518(93.8)   
Divorced 16(4.3) 17(4.3) 29(5.3)   
Widowed 3(0.8) 1(0.3) 2(0.4)   
Average household income (%) ≤1000 RMB 7(1.9) 15(3.8) 17(3.1) 7.397 0.494
1001–2000 RMB 98(26.2) 97(24.3) 138(25.0)   
2001-5000RMB 247(66.0) 251(62.9) 347(62.9)   
5001–10,000 RMB 22(5.9) 34(8.5) 48(8.7)   
>10,000 RMB 0 2(0.5) 2(0.4)   
Smoke (%) smoker 182(48.7) 195(48.9) 280(50.7) 2.088 0.719
ex-smoker 31(8.3) 34(8.5) 55(10.0)   
Non-smoker 161(43.0) 170(42.6) 217(39.3)   
N   374 399 552   
Mother’s age at birth 27.2 ± 4.3 27.4 ± 4.9 27.7 ± 4.5 4.211 0.122
Parity (%) First born 196(52.4) 208(52.1) 269(48.7) 1.226 0.874
Second child 99(26.5) 110(27.6) 133(24.1)   
Other 79(21.1) 81(20.3) 120(21.7)   
Birth weight (g) 3203.6 ± 571.5 3195.4 ± 593.8 3187.6 ± 570.9 0.066 0.936
Alcohol dependence family history (%) 10(2.7) 9(2.3) 14(2.5) 0.147 0.929