Table 2.
Characteristics of males (ages 18–30), stratified by maternal PBB concentration at enrollment (N=216)
| PBB concentration (ppb) |
|||||
|---|---|---|---|---|---|
| Characteristic | N (%) | ≤1 N (%) | 1–3.5 N (%) | >3.5 N (%) | P-value* |
| Age (years) | 0.77* | ||||
| 18 – 19 | 30 (13.9) | 11 (14.3) | 8 (11.4) | 11 (15.9) | |
| 20 – 24 | 98 (45.4) | 34 (44.2) | 37 (52.9) | 27 (39.1) | |
| 25 – 29 | 74 (34.3) | 27 (35.1) | 22 (31.4) | 25 (36.2) | |
| 30 – 31 | 14 (6.5) | 5 (6.5) | 3 (4.3) | 6 (8.7) | |
| Birthweight (g) | 0.36 | ||||
| 1928 – 2499 | 7 (3.3) | 1 (1.3) | 1 (1.5) | 5 (7.3) | |
| 2500 – 4500 | 196 (91.2) | 71 (92.2) | 64 (92.8) | 61 (88.4) | |
| 4501 – 5868 | 12 (5.6) | 5 (6.5) | 4 (5.8) | 3 (4.4) | |
| Gestational age (wks) | 0.63 | ||||
| 34 – 37 | 22 (10.2) | 11 (14.3) | 6 (8.6) | 5 (7.3) | |
| 38 – 42 | 173 (80.1) | 59 (76.6) | 56 (80.0) | 58 (84.1) | |
| 43 – 45 | 21 (9.7) | 7 (9.1) | 8 (11.4) | 6 (8.7) | |
| Current height | 0.38 | ||||
| 4’5” – 5 ‘ 7” | 18 (8.3) | 3 (3.9) | 9 (12.9) | 6 (8.7) | |
| 5’ 8” – 6’ | 125 (57.9) | 45 (58.4) | 40 (57.1) | 40 (58.0) | |
| 6’1” – 6’10” | 73 (33.8) | 29 (37.7) | 21 (30.0) | 23 (33.3) | |
| Current Weight (lbs) (quartiles) | 0.02 | ||||
| 110 – 175 | 82 (38.1) | 27 (35.1) | 26 (37.1) | 29 (42.7) | |
| 176 – 215 | 82 (38.1) | 23 (29.9) | 28 (40.0) | 31 (45.6) | |
| 216 – 300 | 51 (23.7) | 27 (35.1) | 16 (22.9) | 8 (11.8) | |
| BMI (kg/m2) | 0.07* | ||||
| 17.6 –18.5 | 6 (2.8) | 2 (2.6) | 1 (1.4) | 3 (4.4) | |
| 18.6 – 24.9 | 79 (36.7) | 27 (35.1) | 24 (34.3) | 28 (41.2) | |
| 25 – 29.9 | 86 (40.0) | 24 (31.2) | 33 (47.1) | 29 (42.7) | |
| 30 – 44.4 | 44 (20.5) | 24 (31.2) | 12 (17.1) | 8 (11.8) | |
| Height compared to peers at age 11 | 0.13 | ||||
| Shorter | 34 (15.7) | 8 (10.4) | 12 (17.1) | 14 (20.3) | |
| About average | 122 (56.5) | 43 (55.8) | 36 (51.4) | 43 (62.3) | |
| Taller | 60 (27.8) | 26 (33.8) | 22 (31.4) | 12 (17.4) | |
| Weight compared to peers at age 11 | 0.17 | ||||
| Thinner | 45 (20.8) | 16 (20.8) | 10 (14.3) | 19 (27.5) | |
| About average | 111 (51.4) | 36 (46.8) | 38 (54.3) | 37 (53.6) | |
| Heavier | 60 (27.8) | 25 (32.5) | 22 (31.4) | 13 (18.8) | |
Missing values 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.