Table 1.
Distributions of values of exposure, outcome, and confounder variables observed in participants with complete data for all included variables, and distributions in imputed datasets
| Distribution n (%) for categorical variables Mean (s.e.) for continuous variables |
||||
|---|---|---|---|---|
| Imputed variable | n (%) data missing | Observed data (n = 1282) |
Imputed datasets (n = 4042) |
|
| Timing of menarche | Early | 0 | 166 (12.95) | 15.91 |
| Normative | 0 | 880 (68.64) | 67.64 | |
| Late | 0 | 236 (18.41) | 16.45 | |
| Self-harm (age 16 years) | 1342 (33.14) | 302 (23.56) | 25.26 | |
| Non-suicidal self-harm (age 16 years) | 212 (16.54) | 17.41 | ||
| Self-harm with suicidal intent (age 16 years) | 90 (7.02) | 7.85 | ||
| Self-harm (age 21 years) | 1165 (28.77) | 384 (32.08) | 34.45 | |
| Maternal education | <O-level | 168 (4.15) | 180 (14.04) | 24.20 |
| O-level | 422 (32.92) | 34.75 | ||
| A-level | 377 (29.41) | 25.34 | ||
| Degree | 303 (23.63) | 15.71 | ||
| Maternal depression | 521 (12.87) | 99 (7.72) | 11.53 | |
| Sexual abuse | 1895 (46.80) | 64 (4.99) | 6.25 | |
| Parental separation | 0 | 116 (9.05) | 15.17 | |
| Material hardship | 949 (23.44) | 1.60 (2.55) | 2.07 (0.51) | |
| Body mass index (BMI) | 628 (15.51) | 17.75 (2.79) | 17.98 (0.49) | |
Proportions are displayed for imputed datasets.