Table S2.
Distribution of Sociodemographic Characteristics in the Original Avon Longitudinal Study of Parents and Children (ALSPAC) Cohort and the Study Partial and Complete Samples
| Sociodemographic Characteristics | Core ALSPAC Sample: Lacking Exposure or Outcome Data (n = 14,684) |
Partial Sample: Exposure and Outcome Data Available (n = 4,479) |
Complete Sample: Exposure, Outcome, and Confounders Data Available (n = 2,726) |
|---|---|---|---|
| n (%) | n (%) | n (%) | |
| Child characteristics | |||
| Sex | |||
| Male | 7,536 (51) | 1,787 (42) | 1,171 (44) |
| Female | 7,148 (49) | 2,430 (58) | 1,468 (56) |
| Ethnicity | |||
| White | 11,468 (95) | 3,936 (96) | 2,563 (97) |
| Nonwhite | 609 (5) | 144 (4) | 76 (3) |
| Socioeconomic position | |||
| Parental social class | |||
| Professional/managerial | 5,873 (51) | 2,512 (63) | 1,710 (65) |
| Manual | 5,620 (49) | 1,475 (37) | 929 (35) |
| Accommodation type | |||
| Detached house | 1,895 (17) | 896 (22) | 624 (24) |
| Semi-detached house | 7,702 (69) | 2,777 (69) | 1,837 (70) |
| Flat/apartment | 1,497 (14) | 343 (9) | 178 (6) |
| Maternal educational attainment | |||
| Degree | 1,599 (14) | 894 (22) | 615 (23) |
| A-level | 2,791 (24) | 1,175 (29) | 789 (30) |
| O-level | 5,518 (47) | 1,652 (41) | 1,071 (41) |
| Less than O-level | 1,738 (15) | 298 (8) | 164 (6) |
| Financial problems | |||
| No financial problems | 10,284 (78) | 3,485 (84) | 2,399 (91) |
| Financial problems | 2,869 (22) | 675 (16) | 240 (9) |
| Early adversity | |||
| Parental history of suicide | |||
| No parental suicide attempt | 8,033 (98) | 3,917 (99) | 2,607 (99) |
| Parental suicide attempt | 146 (2) | 54 (1) | 32 (1) |
| Childhood sexual abuse | |||
| No child sexual abuse | 8,751 (99) | 4,012 (99) | 2,631 (99) |
| Childhood sexual abuse | 50 (1) | 19 (1) | 8 (1) |
| Parental cruelty to children | |||
| No | 4,872 (95) | 3,003 (95) | 2,520 (95) |
| Yes | 240 (5) | 141 (5) | 119 (5) |
| Maternal age and mental health | |||
| Maternal age, mean (SD) | 27.3 (5.0) | 28.8 (4.4) | 29.1 (4.3) |
| Maternal antenatal anxiety, mean (SD) | 4.5 (3.3) | 3.64 (3.74) | 4.3 (3.2) |
| Maternal antenatal depression | |||
| No | 8,740 (76) | 3,245 (84) | 2,294 (87) |
| Yes | 2,697 (24) | 611 (16) | 345 (13) |
| Maternal early postnatal depression | |||
| No | 9,060 (84) | 3,499 (88) | 2,378 (90) |
| Yes | 1,756 (16) | 470 (12) | 261 (10) |