Table 5 Fixed Effects for Cross-Classified Models
From: A multilevel non-hierarchical study of birth weight and socioeconomic status
| Â | Â | Model III | Model IIIa | Model IIIb |
|---|---|---|---|---|
|  |  | β (grams) (SE;P-Value) | β (grams) (SE;P-Value) | β (grams) (SE;P-Value) |
| Â | AIC | 21201.52 | 21243.31 | 21279.45 |
Gender | Male v Female | 158.30(21.62; < 0.001) | 159.07(21.57; < 0.001) | 160.25(21.60; < 0.001) |
Gestational duration | Weeks | 52.94(6.49; < 0.001) | 51.25(6.46; < 0.001) | 54.34(6.47; < 0.001) |
Birth order | - | < 0.001 | < 0.001 | < 0.001 |
| Â | 1v3+ | -229.17(34.44; < 0.001) | -221.10(33.44; < 0.001) | -223.98(34.35; < 0.001) |
| Â | 2v3+ | -145.33(31.21; < 0.001) | -141.77(30.69; < 0.001) | -139.72(31.13; < 0.001) |
Year of birth | Â | 0.094 | 0.093 | 0.150 |
| Â | (1975 v 1983) | -63.72(53.91;0.239) | -63.95(53.91;0.238) | -69.04(53.75;0.201) |
| Â | (1976 v 1983) | 61.63(54.52;0.260) | 62.94(54.34;0.249) | 46.96(54.30;0.389) |
| Â | (1977 v 1983) | -61.82(47.24;0.193) | -63.26(47.24;0.183) | -60.90(47.10;0.198) |
| Â | (1978 v 1983) | -40.11(44.6;0.370) | -40.20(44.55;0.368) | -45.58(44.56;0.308) |
| Â | (1979 v 1983) | -63.04(41.19;0.128) | -67.56(41.16;0.103) | -64.65(41.14;0.118) |
| Â | (1980 v 1983) | 37.05(39.51;0.350) | 31.98(39.41;0.418) | 29.39(39.39;0.457) |
| Â | (1981 v 1983) | -1.26(41.97;0.976) | -4.23(41.93;0.920) | -3.79(41.88;0.928) |
| Â | (1982 v 1983) | -4.98(41.07;0.904) | -9.10(41.04;0.825) | -9.10(41.01;0.825) |
Adequate prenatal care | Yes v No | 73.98(35.73;0.038) | 82.16(35.58;0.021) | 71.07(35.66;0.046) |
Inadequate weight gain | Yes v No | -184.84(44.11; < 0.001) | -190.94(44.02; < 0.001) | -181.72(44.06; < 0.001) |
Maternal age | Years | -3.08(3.28;0.348) | -1.91(3.07;0.534) | -2.12(3.26;0.516) |
Maternal race | White v NonWhite | 188.19(65.56;0.004) | 199.20(65.35;0.002) | 189.53(65.20;0.004) |
Any diabetes | Yes v No | 246.00(70.70;0.001) | 235.57(70.66;0.001) | 242.26(70.33;0.001) |
Any hypertension | Yes v No | -17.51(45.94;0.703) | -15.25(45.89;0.740) | -23.49(45.72;0.607) |
Cervical incompetence | Yes v No | -151.88(89.70;0.090) | -153.72(89.71;0.087) | -149.53(89.48;0.095) |
Prior low birth weight infant | Yes v No | -245.43(64.48; < 0.001) | -237.67(64.55; < 0.001) | -248.83(64.17; < 0.001) |
Prior preterm infant | Yes v No | -14.96(56.14;0.790) | -19.73(56.23;0.726) | -13.08(55.89;0.815) |
Smoking category | Â | < 0.001 | < 0.001 | < 0.001 |
| Â | Avg < 10 cig v None | -140.06(34.18; < 0.001) | -148.57(33.99; < 0.001) | -141.18(34.10; < 0.001) |
| Â | Avg 11-20 cig v None | -212.59(43.57; < 0.001) | -219.62(43.41; < 0.001) | -212.27(43.39; < 0.001) |
| Â | Avg 21+ cig v None | -200.75(69.52;0.005) | -221.78(69.02;0.002) | -209.73(69.21;0.003) |
Alcohol consumption | Â | 0.945 | 0.954 | 0.933 |
| Â | > = 1 Trimester v None | -9.76(37.68;0.796) | -9.53(37.53;0.800) | -11.34(37.57;0.763) |
| Â | 3 Trimesters v None | -7.59(27.92;0.786) | -6.29(27.83;0.821) | -7.88(27.84;0.777) |
Maternal education | Â | 0.242 | Â | 0.251 |
| Â | < HS v College | -127.67(79.49;0.111) | Â | -129.77(79.30;0.104) |
| Â | HS Grad v College | 3.31(27.04;0.903) | Â | -2.28(26.84;0.932) |
Paternal occupation | Â | 0.102 | Â | 0.085 |
| Â | Blue v White Collar | -46.64(27.35;0.09) | Â | -48.82(27.16;0.075) |
| Â | Other v White Collar | 22.53(35.25;0.524) | Â | 21.88(35.18;0.535) |
% Adults living in poverty | > 0% v 0% | -51.41(28.13;0.068) | -50.34(28.01;0.072) | Â |
Mean family income | Â | 0.831 | 0.851 | Â |
(quartiles) | Q1vQ4 | -3.13(37.61;0.934) | -10.38(37.33;0.781) | Â |
| Â | Q2vQ4 | -0.52(35.04;0.988) | 0.33(34.87;0.992) | Â |
| Â | Q3vQ4 | -29.79(37.22;0.425) | -28.11(37.03;0.449) | Â |
% Adults graduated | Â | 0.138 | 0.124 | Â |
4 year college (quartiles) | Q1vQ4 | -50.49(37.06;0.175) | -51.99(36.8;0.16) | Â |
| Â | Q2vQ4 | -0.53(34.55;0.988) | -3.00(34.41;0.931) | Â |
| Â | Q3vQ4 | 41.22(37.69;0.276) | 41.29(37.52;0.273) | Â |
% Unemployment | ≤ 10% v > 10% | 19.5(32.54;0.549) | 18.84(32.37;0.561) |  |