Table 2.
Association between ESR and IQ at age 18 years
| ESR (mm/h) at 18–20 years | No. | Mean IQ at 18–20 years (SD) | Mean difference [95% CI]a | |||
|---|---|---|---|---|---|---|
| Unadjusted | p Value | Adjustedb | p Value | |||
| 0–3 | 470 923 | 100.20 (15.00) | Reference | − | Reference | − |
| 4–6 | 112 089 | 99.71 (14.96) | −0.48 [−0.58, −0.38] | <0.001 | −0.30 [−0.39, −0.20] | <0.001 |
| 7–10 | 35 023 | 99.23 (15.04) | −0.95 [−1.12, −0.79] | <0.001 | −0.64 [−0.80, −0.49] | <0.001 |
| ⩾11 | 20 178 | 98.61 (14.98) | −1.57 [−1.78, −1.36] | <0.001 | −1.08 [−1.28, −0.88] | <0.001 |
a
The mean difference was calculated using the group with ESR = 0–3 mm/h as a reference.
b
Regression models were adjusted for household crowding, winter birth, parental socioeconomic status at 8–12 years, migration status, and parental history of non-affective psychoses.