Table 1. Cohort Descriptive Data.
| Maternal and perinatal characteristics | Total | No infection | Any infection | F/chi-square (df) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Note. Highest educational achievement was scored using UK educational system according to four categories (1 = Certificate of Secondary Education/vocational training; 2 = O-levels, equivalent to modern day General Certificate of Secondary Education; 3 = A-levels, comparable to college entrance examinations; 4 = university degree or higher degree); household crowding was calculated by dividing the number of people in the household by the number of rooms (1 = 0–.50; 2 = .50–.75; 3 = .75–1.00; 4 = > 1.00). | ||||||||||||
| Maternal age | 28.66 | 28.81 | 28.45 | 11.04 (1,6,914) | ||||||||
| (4.54) | (4.48) | (4.61) | p = .001 | |||||||||
| Education | 3.21 | 3.23 | 3.17 | 3.55 (1,7,016) | ||||||||
| (1.23) | (1.23) | (1.23) | p = .060 | |||||||||
| Prepregnancy BMI | 22.85 | 22.69 | 23.08 | 18.84 (1,6,504) | ||||||||
| (3.63) | (3.47) | (3.83) | p < .001 | |||||||||
| Crowding | 1.77 | 1.73 | 1.83 | 25.80 (1,6,844) | ||||||||
| (.87) | (.85) | (.89) | p < .001 | |||||||||
| Prenatal smoking | 1.22 | .97 | 1.55 | 36.54 (1,6,972) | ||||||||
| (3.92) | (3.45) | (4.51) | p < .000 | |||||||||
| Birth weight (g) | 3,510.13 | 3,506.41 | 3,515.21 | .67 (1,7,040) | ||||||||
| (444.15) | (448.72) | (437.85) | p = .412 | |||||||||
| Gestational age (wks) | 39.79 | 39.78 | 39.81 | .70 (1,7,040) | ||||||||
| (1.29) | (1.31) | (1.26) | p = .404 | |||||||||
| Prenatal anxiety | 4.85 | 4.32 | 5.59 | 153.42 (1,6,839) | ||||||||
| (3.45) | (3.23) | (3.62) | p < .001 | |||||||||
| Child characteristics | ||||||||||||
| Sex (% male] | 51% (3,595) | 51% (2,060) | 52% (1,535) | .47 (1) | ||||||||
| p = .499 | ||||||||||||
| IQ (full-scale) | 105.59 | 106.21 | 104.73 | 10.48 (1,5,211) | ||||||||
| (16.26) | (16.21) | (16.30) | p = .001 | |||||||||
| Symptoms | ||||||||||||
| SCDC | 2.75 | 2.53 | 3.04 | 32.82 (1,6,798) | ||||||||
| (3.65) | (3.39) | (3.96) | p < .001 | |||||||||
| ADHD | 4.81 | 4.39 | 5.39 | 36.13 (1,6,762) | ||||||||
| (6.78) | (6.38) | (7.25) | p < .001 | |||||||||
| Depressive | .31 | .27 | .36 | 11.72 (1,6,887) | ||||||||
| (1.01) | (.95) | (1.09) | p = .001 | |||||||||
| Disruptive behavior | .19 | .16 | .24 | 13.16 (1,7,002) | ||||||||
| (.95) | (.86) | (1.07) | p < .001 | |||||||||