Table 1.
Anthropometric measures and air pollution levels in the study by cohort (mean ± SD).
| Study population | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Overall (n = 2337) | Asturias (n = 417) | Gipuzkoa (n = 573) | Sabadell (n = 563) | Valencia (n = 784) | p-Valueª | ||||||
| Anthropometric measures | ||||||||||||
| Weight (g) | 3,342 ± 401 | 3,365 ± 386 | 3,367 ± 392 | 3,312 ± 391 | 3,333 ± 419 | 0.065 | ||||||
| Length (cm) | 49.9 ± 1.8 | 50.1 ± 1.9 | 49.2 ± 1.7 | 49.6 ± 1.7 | 50.5 ± 1.8 | < 0.001 | ||||||
| HC (cm) | 34.4 ± 1.3 | 34.4 ± 1.3 | 34.8 ± 1.3 | 34.3 ± 1.1 | 34.3 ± 1.3 | < 0.001 | ||||||
| Levels of air pollution (µg/m3) | ||||||||||||
| NO2 | ||||||||||||
| All | 29.2 ± 11.1 | 23.5 ± 6.5 | 20.1 ± 6.4 | 31.9 ± 8.6 | 36.9 ± 11.1 | < 0.001 | ||||||
| Urban | 29.8 ± 11.0 | 23.8 ± 6.5 | 20.2 ± 6.4 | 31.9 ± 8.6 | 38.3 ± 9.8 | |||||||
| Rural | 16.4 ± 4.9 | 18.0 ± 5.3 | 17.5 ± 5.9 | NA | 15.1 ± 3.9 | |||||||
| Benzene | ||||||||||||
| All | 1.6 ± 1.1 | 2.3 ± 1.3 | 1.0 ± 0.3 | 0.81 ± 0.3 | 2.17 ± 0.6 | < 0.001 | ||||||
| Urban | 1.6 ± 0.9 | 2.3 ± 1.3 | 1.0 ± 0.3 | 0.81 ± 0.3 | 2.2 ± 0.6 | |||||||
| Rural | 1.5 ± 0.7 | 1.7 ± 1.1 | 0.9 ± 0.2 | NA | 1.7 ± 0.6 | |||||||
| NA, not applicable. aAnalysis of variance p-value for the comparison among cohorts. | ||||||||||||