|
Odds ratios (OR) for association of inadequate/no prenatal care with LBW (<2500 grams) by gestational age category: Comparison of two prenatal care utilization indices. |
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| Gestation |
Total n |
LBW n |
APNCU OR |
R-GINDEX OR |
|
|
||||
| <27 weeks |
263 |
262 |
ne* |
ne* |
| 27–28 |
177 |
172 |
ne* |
ne* |
| 29–30 |
186 |
177 |
0.28 |
0.43 |
| 31–32 |
403 |
380 |
0.72 |
1.03 |
| 33–34 |
865 |
646 |
0.85 |
1.02 |
| 35–36 |
2 926 |
954 |
1.19 |
1.22 |
| 37–38 |
16 024 |
762 |
1.48 |
1.36 |
| 39–40 |
45 115 |
445 |
1.64 |
1.45 |
| 41–42 |
14 964 |
60 |
2.85 |
3.45 |
| 43–44 |
66 |
0 |
ne* |
ne* |
|
|
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| Breslow-Day Test |
p = 0.0159 |
p = 0.0624 |
||
|
*ne = not estimable. | ||||
Heaman et al. BMC Pregnancy and Childbirth 2008 8:15 doi:10.1186/1471-2393-8-15 |
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