Descriptive statistics for birth weight and air pollution variables according to season in São Paulo, Brazil, 1997
| Annual | |||||||
|---|---|---|---|---|---|---|---|
| Mean (SD) | Min | Max | Jan–Mar | Apr–Jun | Jul–Aug | Oct–Dec | |
| Birth weight (g) | 3185.7 (464.3) | 1000 | 5500 | 3179.9 (464.4) | 3183.2 (465.1) | 3190.4 (462.8) | 3189.4 (464.5) |
| PM10 | 60.3 (25.2) | 25.5 | 153.0 | 49.1 (12.2) | 62.7 (20.2) | 78.4 (34.9) | 50.9 (14.9) |
| SO2 | 19.6 (10.3) | 3.4 | 56.9 | 22.3 (7.7) | 28.1 (10.1) | 17.9 (8.7) | 10.3 (3.9) |
| CO | 3.7 (1.6) | 1.1 | 11.4 | 2.9 (0.8) | 3.8 (1.3) | 4.7 (2.2) | 3.2 (1.0) |
| NO2 | 117.9 (51.2) | 42.5 | 399.6 | 109.3 (36.4) | 114.4 (43.8) | 147.2 (67.7) | 100.6 (38.2) |
| O3 | 63.0 (33.5) | 11.7 | 187.6 | 78.0 (37.1) | 54.0 (32.0) | 57.6 (26.4) | 61.6 (33.3) |