Correlation of Shoe Size and Birth Weight by Subgroup
| Subgroup | N (%) | P Value | Pearson Coefficient |
|---|---|---|---|
| Entire sample | 111 | .93 | 0.01 |
| Caucasian | 82 (72) | .80 | 0.02 |
| African American | 14 (14) | .19 | −0.36 |
| Race: Other* | 15 (14) | .41 | 0.22 |
| Primiparous | 49 (44) | .97 | 0.01 |
| Vaginal delivery | 80 (72) | .53 | 0.07 |
| Cesarean | 27 (24) | .33 | −0.19 |
| Vacuum-assisted delivery | 4 (4) | .83 | −0.16 |
| BMI <30 | 94 (85) | .77 | 0.03 |
| BMI >30 | 17 (15) | .31 | −0.25 |
| Age >35 | 6 (5) | .01 | 0.89 |
| Age <35 | 105 (95) | .67 | −0.04 |
* Asian, Hispanic, Pacific Islander.