Table 1.
Follow-up rates at 22 years according to baseline characteristics 1993 Birth Cohort, Pelotas (Brazil)
| Variable | Original sample (1993) | % interviewed in 2015 | P* | % located (interviewed in 2015 + known to have died) | P* |
|---|---|---|---|---|---|
| Sex | 5248 | < 0.001 | < 0.001 | ||
| Male | 2603 | 68.5 | 72.6 | ||
| Female | 2645 | 76.6 | 79.9 | ||
| Birthweight (g) | 5232 | 0.014 | 0.406 | ||
| <2500 | 510 | 66.9 | 79.2 | ||
| 2500–2999 | 1409 | 72.5 | 75.7 | ||
| 3000–3499 | 2030 | 73.6 | 75.9 | ||
| ≥3500 | 1283 | 74.0 | 76.0 | ||
| Gestational age (weeks) | 5171 | 0.002 | 0.205 | ||
| <37 | 589 | 67.1 | 74.1 | ||
| ≥37 | 4582 | 73.3 | 76.5 | ||
| Household incomea | 5249 | < 0.001 | 0.040 | ||
| ≤1 | 967 | 68.5 | 75.1 | ||
| 1.1 to 3.0 | 2260 | 71.6 | 74.8 | ||
| 3.1 to 6.0 | 1204 | 77.3 | 79.6 | ||
| 6.1 to 10 | 433 | 73.0 | 75.7 | ||
| >10 | 385 | 73.5 | 74.6 | ||
| Maternal schooling (years) | 5246 | < 0.001 | 0.068 | ||
| 0 | 134 | 62.31 | 69.3 | ||
| 1 to 4 | 1338 | 69.36 | 74.6 | ||
| 5 to 8 | 2424 | 73.60 | 77.0 | ||
| ≥9 | 1350 | 74.96 | 77.3 | ||
| Total | 5249 | 72.6 | < 0.001 | 76.3 | < 0.001 |
a1 = minimum wage.
*Chi square test.