Table 4 Crude and adjusted ORs (95% CI) for infant mortality by maternal age
1982 | 1993 | 2004 | Pooled cohorts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Deaths/Births (IMR)* | Crude OR (95%CI) | Adjusted OR (95%CI) ¹ | Deaths/Births (IMR)* | Crude OR (95%CI) | Adjusted OR (95%CI) ¹ | Deaths/Births (IMR)* | Crude OR (95%CI) | Adjusted OR (95%CI) ¹ | P valuec | Deaths/Births (IMR)* | Crude OR (95%CI)2 | Adjusted OR (95%CI) 3 | |
Maternal age, y | 0.563 | ||||||||||||
< 16 | 4/65 (61.5) | 2.0 (0.7; 5.5) | 2.1 (0.7; 6.3) | 1/106 (9.4) | 0.5 (0.1; 3.8) | 0.8 (0.1; 6.6) | 5/112 (44.6) | 2.4 (0.9; 6.1) | 2.3 (0.8; 6.5) | 10/283 (35.3) | 1.6 (0.9; 3.2) | 1.9 (0.96; 3.9) | |
16-19 | 39/843 (46.3) | 1.5 (1.0; 2.1) | 1.6 (1.1; 2.5) | 16/804 (19.9) | 1.1 (0.6; 1.9) | 1.4 (0.8; 2.7) | 18/680 (26.5) | 1.4 (0.8; 2.4) | 1.5 (0.8; 2.8) | 73/2,327 (31.4) | 1.3 (1.0; 1.8) | 1.5 (1.1; 2.1) | |
20-29 | 109/3,380 (32.2) | 1.0 | 1.0 | 50/2,754 (18.2) | 1.0 | 1.0 | 40/2,062 (19.4) | 1.0 | 1.0 | 199/8,196 (24.3) | 1.0 | 1.0 | |
P-value | 0.093 a 0.030 b | 0.059 a 0.019 b | 0.713 a 0.888 b | 0.522 a 0.449 b | 0.189 a 0.073 b | 0.259 a 0.101 b | 0.057 a 0.017 b | 0. 013 a 0.004 b | |||||
Maternal age, y | 0.463 | ||||||||||||
< 20 | 43/908 (47.4) | 1.5 (1.0; 2.1) | 1.7 (1.1; 2.5) | 17/910 (18.7) | 1.0 (0.6; 1.8) | 1.4 (0.7; 2.6) | 23/792 (29.0) | 1.5 (0.9; 2.5) | 1.6 (0.8; 2.9) | 83/2,610 (31.8) | 1.4 (1.1; 1.8) | 1.6 (1.2; 2.1) | |
20-29 | 109/3,380 (32.2) | 1.0 | 1.0 | 50/2,754 (18.2) | 1.0 | 1.0 | 40/2,062 (19.4) | 1.0 | 1.0 | 199/8,196 (24.3) | 1.0 | 1.0 | |
P-value | 0.035 a | 0.020 a | 0.918 a | 0.318 a | 0.127 a | 0.154 a | 0.020 a | 0.004 a | |||||