Table 2.
Estimates of mean, intracluster correlation coefficients (ICC), their respective 95% CI, design effect (Deff), and mean cluster size (n a ) for numeric maternal characteristics
| Variable | Mean | ICC | 95% CI for ICC | Deff | n a |
|---|---|---|---|---|---|
| Age (years) |
26.1 |
0.018 |
0.004-0.033 |
5.3 |
265 |
| Month stopped working |
6.9 |
0.015 |
<0.001-0.032 |
2.6 |
99 |
| Workload (hours daily) |
8.0 |
0.040 |
0.007-0.072 |
6.9 |
98 |
| Pre-pregnancy weight (Kg) |
62.1 |
0.021 |
0.005-0.038 |
6.6 |
250 |
| Height (m) |
1.6 |
0.041 |
0.011-0.071 |
9.8 |
238 |
| Final weight (Kg) |
73.2 |
0.022 |
0.005-0.040 |
6.4 |
237 |
| Weight gain in pregnancy (Kg) |
10.9 |
0.012 |
0.001-0.023 |
4.5 |
229 |
| Initial Body Mass Index (Kg/m2) |
24.4 |
0.012 |
0.001-0.024 |
4.5 |
230 |
| Final Body Mass Index (Kg/m2) |
28.7 |
0.016 |
0.002-0.030 |
5.5 |
220 |
| Number of pregnancies |
2.4 |
0.006 |
<0.001-0.013 |
2.8 |
265 |
| Number of vaginal deliveries |
0.8 |
0.005 |
<0.001-0.011 |
2.5 |
265 |
| Number of cesarean sections |
0.3 |
0.014 |
0.002-0.025 |
4.7 |
265 |
| Number of abortions |
0.3 |
0.006 |
<0.001-0.013 |
2.3 |
265 |
| Number of uterine curettage | 0.2 | 0.008 | <0.001-0.015 | 2.9 | 264 |