Table 1.
Characteristics of males (ages 5–17), stratified by maternal PBB concentration at enrollment (N=248)
| PBB concentration (ppb) |
|||||
|---|---|---|---|---|---|
| Characteristic | N (%) | ≤1 N (%) | 1–3.0 N (%) | >3.0 N (%) | p value* |
| Age (years) | 0.25 | ||||
| 5–10 | 84 (33.9) | 21 (30.4) | 26 (28.9) | 37 (41.6) | |
| 11–13 | 67 (27.0) | 16 (23.2) | 26 (28.9) | 25 (28.1) | |
| 14–16 | 66 (26.6) | 19 (27.5) | 28 (31.1) | 19 (21.4) | |
| 17–18 | 31 (12.5) | 13 (18.8) | 10 (11.1) | 8 (9.0) | |
| Height for age (%) | 0.84 | ||||
| 1–25 | 30 (12.3) | 333 | 13 (14.8) | 10 (11.4) | |
| 26–50 | 49 (20.1) | 15 (22.1) | 17 (19.3) | 17 (19.3) | |
| 51–75 | 43 (17.6) | 9 (13.2) | 18 (20.5) | 16 (18.2) | |
| 76–100 | 122 (50.0) | 37 (54.4) | 40 (45.5) | 45 (51.1) | |
| Weight for age (%) | 0.69 | ||||
| 1 – 25 | 26 (11.1) | 9 (13.9) | 9 (10.7) | 8 (9.3) | |
| 26 – 50 | 39 (16.6) | 6 (9.2) | 16 (19.1) | 17 (19.8) | |
| 51 – 75 | 55 (23.4) | 16 (24.6) | 19 (22.6) | 20 (23.3) | |
| 76 – 100 | 115 (48.9) | 34 (52.3) | 40 (47.6) | 41 (47.7) | |
| BMI Percentile | 0.76 | ||||
| Underweight | 14 (6.0) | 5 (7.7) | 4 (4.8) | 5 (5.9) | |
| Healthy weight | 138 (59.0) | 35 (53.9) | 52 (61.9) | 51 (60.0) | |
| Risk of overweight | 41 (17.5) | 12 (18.5) | 17 (20.2) | 12 (14.1) | |
| Overweight | 41 (17.5) | 13 (20.0) | 11 (13.1) | 17 (20.0) | |
| Birthweight (g) | |||||
| 964 – 2499 | 5 (2.0) | 1 (1.5) | 2 (2.2) | 2 (2.3) | 0.59* |
| 2500 – 4500 | 208 (83.9) | 62 (89.9) | 76 (84.4) | 70 (78.7) | |
| 4501 – 5216 | 10 (4.0) | 2 (2.9) | 2 (2.2) | 6 (6.7) | |
| Missing | 25 (10.1) | 4 (5.8) | 10 (11.1) | 11 (12.4) | |
| Gestational age (wks) | |||||
| 26 – 37 | 29 (11.7) | 9 (13.0) | 8 (8.9) | 12 (13.5) | 0.15* |
| 38 – 42 | 215 (86.7) | 60 (87.0) | 78 (86.7) | 77 (86.5) | |
| 43 – 46 | 4 (1.6) | 0 | 4 (4.4) | 0 | |
Missing values are not shown when they comprise less than 5% of the data.
*
Chi Square p value shown, except where indicated by superscript. Superscript indicates Fisher’s Exact Test.