Table 7 |
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|
Fixed Effects for Models with Reduced Covariates |
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|
Level |
Model IV |
Model IVa |
Model IVb |
|
|
β (grams) (P-Value) |
β (grams) (P-Value) |
β (grams) (P-Value) |
||
|
|
||||
|
AIC |
21594.53 |
21519.07 |
21515.5 |
|
|
|
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|
Gender |
Male v Female |
142.89(22.36; < 0.001) |
155.81(22.04; < 0.001) |
147.05(22.10; < 0.001) |
|
Gestational duration |
Weeks |
56.23(6.60; < 0.001) |
||
|
Birth order |
- |
< 0.001 |
< 0.001 |
< 0.001 |
|
1v3+ |
-169.84(34.43; < 0.001) |
-178.72(33.76; < 0.001) |
-182.39(34.10; < 0.001) |
|
|
2v3+ |
-115.09(31.58; < 0.001) |
-102.30(31.17;0.001) |
-130.50(31.37; < 0.001) |
|
|
Year of birth |
0.021 |
0.018 |
0.025 |
|
|
(1975 v 1983) |
-80.33(55.82;0.152) |
-83.91(54.71;0.127) |
-85.40(55.12;0.123) |
|
|
(1976 v 1983) |
50.70(56.64;0.372) |
39.70(55.55;0.476) |
60.70(55.88;0.279) |
|
|
(1977 v 1983) |
-67.24(48.62;0.169) |
-85.48(47.84;0.076) |
-49.98(48.21;0.302) |
|
|
(1978 v 1983) |
-43.56(46.13;0.347) |
-65.23(45.43;0.153) |
-29.49(45.63;0.519) |
|
|
(1979 v 1983) |
-76.52(42.42;0.073) |
-78.76(41.77;0.061) |
-67.50(42.02;0.110) |
|
|
(1980 v 1983) |
43.95(40.58;0.281) |
35.45(40.13;0.378) |
50.35(40.25;0.213) |
|
|
(1981 v 1983) |
10.01(43.24;0.817) |
-0.34(42.71;0.994) |
17.47(42.83;0.684) |
|
|
(1982 v 1983) |
21.80(42.41;0.608) |
6.61(41.77;0.874) |
24.56(41.94;0.559) |
|
|
Adequate prenatal care |
Yes v No |
108.62(37.24;0.004) |
99.59(36.52;0.006) |
95.28(36.76;0.010) |
|
Maternal age |
Years |
-4.10(3.44;0.233) |
-2.86(3.34;0.391) |
-4.95(3.37;0.142) |
|
Maternal race |
White v NonWhite |
211.69(67.95;0.002) |
197.4(65.89;0.003) |
243.75(66.73; < 0.001) |
|
|
||||
|
Smoking category |
< 0.001 |
|||
|
Avg < 10 cig v None |
-150.15(34.85; < 0.001) |
|||
|
Avg 11-20 cig v None |
-248.18(45.08; < 0.001) |
|||
|
Avg 21+ cig v None |
-254.02(71.42;0.001) |
|||
|
Maternal education |
0.229 |
0.092 |
0.624 |
|
|
< HS v College |
-137.77(82.55;0.097) |
-176(80.60;0.031) |
-61.88(82.02;0.452) |
|
|
HS Grad v College |
0.64(28.28;0.982) |
-10.35(27.55;0.708) |
11.80(27.81;0.672) |
|
|
Paternal occupation |
0.116 |
0.033 |
0.243 |
|
|
Blue v White Collar |
-56.66(28.59;0.049) |
-66.44(27.87;0.018) |
-43.24(28.16;0.127) |
|
|
Other v White Collar |
-2.81(36.96;0.939) |
7.33(36.07;0.839) |
5.01(36.39;0.891) |
|
|
|
||||
|
% Adults living in poverty |
> 0% v 0% |
-43.96(29.48;0.136) |
-39.04(28.66;0.173) |
-52.10(28.97;0.072) |
|
Mean family income (quartiles) |
0.945 |
0.914 |
0.957 |
|
|
Q1vQ4 |
-11.86(39.32;0.763) |
-20.49(38.25;0.593) |
-7.88(38.64;0.839) |
|
|
Q2vQ4 |
0.59(36.71;0.987) |
-5.86(35.66;0.870) |
1.29(36.02;0.971) |
|
|
Q3vQ4 |
-19.08(39.04;0.626) |
-22.55(37.96;0.553) |
-17.43(38.35;0.65) |
|
|
% Adults graduated |
0.019 |
0.094 |
0.054 |
|
|
4 year college (quartiles) |
Q1vQ4 |
-81.91(38.54;0.035) |
-66.80(37.54;0.077) |
-67.30(37.92;0.078) |
|
Q2vQ4 |
-11.96(36.26;0.742) |
-15.48(35.28;0.661) |
-1.58(35.64;0.965) |
|
|
Q3vQ4 |
44.29(39.57;0.265) |
30.93(38.49;0.423) |
41.58(38.85;0.286) |
|
|
% Unemployment |
≤ 10% v > 10% |
26.84(34.02;0.430) |
30.37(33.11;0.359) |
23.33(33.43;0.485) |
|
|
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|
‡Type III p-value for overall variation between categories |
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|
Young et al. International Journal of Health Geographics 2010 9:36 doi:10.1186/1476-072X-9-36 |
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