Table 1.
Baseline characteristics of the sample
| Characteristic | All participants | Groups based on ESR Levels at Conscription in mm/h | ||||
|---|---|---|---|---|---|---|
| 0–3 | 4–6 | 7–10 | ⩾11 | p Valuea | ||
| Sample size, N (% of total) | 638 213 | 470 923 (73.79) | 112 089 (17.56) | 35 023 (5.49) | 20 178 (3.16) | − |
| ESR, M (SD) | 3.38 (3.32) | 2.05 (0.85) | 5.00 (0.83) | 8.45 (1.14) | 16.70 (6.94) | <0.001 |
| IQ at conscription, M (SD) | 100.00 (15.00) | 100.20 (15.00) | 99.71 (14.96) | 99.23 (15.04) | 98.61 (14.98) | <0.001 |
| Age at conscription, M (SD) | 18.38 (0.75) | 18.38 (0.75) | 18.37 (0.75) | 18.39 (0.74) | 18.40 (0.71) | <0.001 |
| Age at end of follow-up, M (SD) | 53.76 (4.26) | 53.72 (4.32) | 53.73 (4.05) | 53.99 (4.11) | 54.38 (4.17) | <0.001 |
| Parental history of psychoses, N (%) | 17 161 (2.69) | 12 698 (2.70) | 2991 (2.67) | 923 (2.64) | 549 (2.72) | 0.863 |
| Migration Status, N (%) | 95 318 (14.94) | 71 284 (15.14) | 16 174 (14.43) | 4940 (14.11) | 2920 (14.47) | <0.001 |
| Winter birth, N (%) | 330 651 (51.81) | 243 609 (51.73) | 58 136 (51.87) | 18 295 (52.24) | 10 611 (52.59) | 0.032 |
| Parental socioeconomic status at age 8–12 years | ||||||
| Worker, N (%) | 235 705 (36.93) | 171 820 (36.49) | 42 107 (37.57) | 13 572 (38.75) | 8206 (40.67) | |
| White collar, N (%) | 263 805 (41.33) | 197 830 (42.01) | 45 154 (40.28) | 13 465 (38.45) | 7356 (36.46) | |
| Own business, N (%) | 104 999 (16.45) | 76 390 (16.22) | 18 928 (16.89) | 6146 (17.55) | 3555 (17.62) | |
| Unknown, N (%) | 33 704 (5.28) | 24 903 (5.29) | 5900 (5.26) | 1840 (5.25) | 1061 (5.26) | <0.001 |
| Household Crowding | ||||||
| Overcrowded, N (%) | 180 539 (28.29) | 130 274 (27.66) | 33 368 (29.77) | 10 582 (30.21) | 6315 (31.30) | |
| Not overcrowded, N (%) | 448 877 (70.33) | 334 097 (70.95) | 77 188 (68.86) | 23 973 (68.45) | 13 619 (67.49) | |
| Unknown, N (%) | 8797 (1.38) | 6552 (1.39) | 1533 (1.37) | 468 (1.34) | 244 (1.21) | <0.001 |
a
p values are based on ANOVA tests for continuous and χ2 tests for categorical variables.