Table 3 Results of multiple regression analyses for birth weight percentile, length, head circumference, and gestational age
|  | df | Mean square | F value | p value | R2 | Ä R2 | |
|---|---|---|---|---|---|---|---|
Birth weight percentile | |||||||
 Block 1 | HIV status (pos/neg) | 1 | 3004 | 2.92 | 0.088 | 0.00 |  |
 Block 2 | Smoking, depression, SES | 4 | 10,597 | 10.88 | 0.000 | 0.06 | 0.06 |
 Block 3 | 3-month alcohol use severity | 5 | 9816 | 10.17 | 0.000 | 0.07 | 0.01 |
 Block 4 | Interactions | 7 | 7058 | 7.29 | 0.000 | 0.07 | 0.00 |
Length | |||||||
 Block 1 | HIV status (pos/neg) | 1 | 0.001 | 0.001 | 0.992 | 0.00 |  |
 Block 2 | Smoking, depression, SES | 4 | 115.17 | 8.23 | 0.000 | 0.05 | 0.05 |
 Block 3 | 3-month alcohol use severity | 5 | 93.36 | 6.67 | 0.000 | 0.05 | 0.00 |
 Block 4 | Interactions | 7 | 66.83 | 4.76 | 0.000 | 0.05 | 0.00 |
Head circumference | |||||||
 Block 1 | HIV status (pos/neg) | 1 | 7.352 | 2.10 | 0.148 | 0.00 | 0.00 |
 Block 2 | 3-month alcohol use severity | 4 | 38.649 | 11.73 | 0.000 | 0.07 | 0.07 |
 Block 3 | 3-month alcohol use severity | 5 | 31.496 | 9.56 | 0.000 | 0.07 | 0.00 |
 Block 4 | Interactions | 7 | 22.599 | 6.84 | 0.000 | 0.07 | 0.00 |
Gestational age (log) | |||||||
 Block 1 | HIV status (pos/neg) | 1 | 0.003 | 0.60 | 0.439 | 0.00 |  |
 Block 2 | Smoking, depression, SES | 4 | 0.021 | 3.86 | 0.004 | 0.02 | 0.02 |
 Block 3 | 3-month alcohol use severity | 5 | 0.021 | 3.85 | 0.002 | 0.03 | 0.01 |
 Block 4 | Interactions | 7 | 0.015 | 2.80 | 0.007 | 0.03 | 0.00 |