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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Cancer Causes Control. 2012 Jan 18;23(3):445–454. doi: 10.1007/s10552-011-9893-6

Table 1.

Maternal and birth characteristics by race and hospital, females, HUB Study 2004 to 2005

Hospital
1
Hospital
2
Hospital
1 & 2
Hospital
2
P

AA AA AA W AA in
hospital 1
vs 2
AA vs W in
hospital 2
AA in
hospital 1
& 2 vs W
in hospital
2
N 32 45 77 41
Mean (SD) mother’s age (y) 25.2 (5.3) 23.3 (6.2) 24.1 (5.9) 28.2 (6.1) 0.16* 0.0004* 0.0005*
Mean (SD) birth weight (g) 3,205 (344.6) 3,245 (354.4) 3,228 (348.6) 3,424 (349.0) 0.62* 0.02* 0.004*
Mean (SD) placental weight (g) 613.4 (143.8) 691.1 (153.1) 658.8 (153.3) 674.9 (115.5) 0.03* 0.58* 0.56*
Parity (%)
   0 12.5 40.0 28.6 34.2
   1 34.4 31.1 32.5 51.2
   2 28.1 13.3 19.5 7.3
   ≥ 3 25.0 15.6 19.5 7.3 0.05 0.23 0.05
Time of day of birth (%)
   Midnight to < 6 am 3.1 25.6 16.0 22.0
   6 am to < noon 43.8 27.9 34.7 19.5
   noon to < 6 pm 43.8 30.2 36.0 29.3
   6 pm to < midnight 9.4 16.3 13.3 29.3 0.03 0.51 0.09

Abbreviations: AA, African-American; W, White

*

t test

Chi square test