Table 3.
Personal PM2·5 exposure in children by age at recruitment and study group
|
Children recruited at age 6 weeks |
Exposure in children recruited at age 6 months |
Exposure in all children |
||||||
|---|---|---|---|---|---|---|---|---|
| Exposure at recruitment |
Exposure at age 6 months |
Participants | Geometric mean (95% CI), μg/m3 | Participants | Geometric mean (95% CI), μg/m3 | |||
| Participants | Geometric mean (95% CI), μg/m3 | Participants | Geometric mean (95% CI), μg/m3 | |||||
| Control group | 115 | 38·23 (33·1–44·2) | 110 | 52·5 (45·4–60·9) | 109 | 59·2 (51·4–68·2) | 334 | 49·0 (45·0–53·3) |
| Intervention group | 101 | 41·59 (36·6–47·3) | 97 | 62·1 (52·7–73·2) | 113 | 60·1 (52·0–69·4) | 311 | 53·9 (49·4–58·7) |
This analysis was done in children with valid nasopharyngeal Streptococcus pneumoniae carriage assessments and PM2·5 measurements. PM=particulate matter.