Table 2 Distribution of controls and cases and controls of severe maternal morbidity according to selected socio-demographic and clinical factors
From: Severe maternal morbidity: a case-control study in Maranhao, Brazil
Distal and intermediate variables | Cases | Controls | χ2 | OR (95% IC) | p - value |
|---|---|---|---|---|---|
n (%) | n (%) | ||||
Age | |||||
20-34 | 80 (65.6) | 174 (71.3) | 1.00 | ||
<20 | 18 (14.8) | 54 (22.1) | 0.73 (0.40-1.32) | ||
≥35 | 24 (19.7) | 16 (6.6) | 3.26 (1.64-6.48) | ||
15.43 | <0.001 | ||||
Per capita monthly income | |||||
Upper tertile | 30 (24.6) | 79 (32.4) | 1.00 | ||
Middle tertile | 39 (3.0) | 88 (36.1) | 1.17 (0.66-2.05) | ||
Lower tertile | 49 (40.2) | 69 (28.3) | 1.87 (1.07-3.26) | ||
Not informed* | 4 (3.3) | 8 (3.3) | |||
5.61 | 0.06 | ||||
Previous hypertension | |||||
No | 106 (86.9) | 232 (95.1) | 1,00 | ||
Yes | 16 (13.1) | 12 (4.9) | 2.91 (1.33-6.38) | ||
7.74 | <0.01 | ||||
Age at the first pregnancy (years) | |||||
≥20 | 66 (54.1) | 111 (45.5) | 1.00 | ||
16-19 | 45 (36.9) | 94 (38.5) | 0.80 (0.50-1.28) | ||
<16 | 11 (9.0) | 39 (16.0) | 0.47 (0.22-0.98) | ||
4.39 | 0.11 | ||||
Previous abortion | |||||
No | 80 (65.6) | 187 (76.6) | 1.00 | ||
Yes | 42 (34.4) | 57 (23.4) | 1.72 (1.06-2.77) | ||
5.04 | 0.03 | ||||
Physical activity during gestation period (leisure time) | |||||
No activity | 93 (76.2) | 160 (65.6) | 1.00 | ||
1-2 x week | 15 (12.3) | 44 (18.0) | 0.58 (0.31-1.11) | ||
≥ 3 x week | 14 (11.5) | 40 (16.4) | 0.60 (0.31-1.16) | ||
4.33 | 0.11 | ||||