Table 4.
Mean value of developmental outcomes stratified by PBB concentration, among sons age 18–30 years old
| Mean stratified by maternal enrollment PBB* |
Mean stratified by estimated PBB at conception* |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Developmental Outcome | N | ≤1 ppb | 1 – 3.5 ppb | >3.5 ppb | P value† | ≤1 ppb | 1 – 3.1 ppb | >3.1 ppb | P value† |
| Current Height (in) | 216 | 71.7 | 70.9 | 71.2 | 0.17 | 71.9 | 70.9 | 71.2 | 0.06 |
| Current Weight (lbs) | 215 | 201.7 | 190.7 | 186.3 | 0.05, Trend p= 0 .01 | 200.4 | 193.6 | 186.8 | 0.11, Trend p= 0 .04 |
| Current BMI (kg/m2) | 215 | 27.6 | 26.5 | 25.8 | 0.14, Trend p= 0.04 | 27.2 | 27.0 | 25.9 | 0.21, Trend p= 0 .12 |
| Age when current height reached (years) | 215 | 17.4 | 17.4 | 17.1 | 0.64 | 17.5 | 17.2 | 17.3 | 0.65 |
| Age when pubic hair appeared (years) | 195 | 12.7 | 12.2 | 12.5 | 0.07 | 12.7 | 12.2 | 12.5 | 0.08 |
*
The mean values are adjusted for the relatedness of siblings.
†
Score Test p values shown first. Test of trend shown where indicated.