Table 2.
Distribution of controls and cases and controls of severe maternal morbidity according to selected socio-demographic and clinical factors
| 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 | ||||
* The missing information was not considered for the assessment of χ2.
São Luis, Brazil, 2009.