Table 3.
Association between maternal PFAA serum concentrations and duration of breastfeeding.
| Breastfeeding duration | n | PFOA | PFOS | PFNA | PFHxS | ||||
|---|---|---|---|---|---|---|---|---|---|
| Percent change (95% CI) | p‑Value | Percent change (95% CI) | p‑Value | Percent change (95% CI) | p‑Value | Percent change (95% CI) | p‑Value | ||
| Not breastfed | 254 | Reference | Reference | Reference | Reference | ||||
| ≤ 6 months | 251 | –5 (–18, 8) | 0.448 | –9 (–18, 1) | 0.078 | –8 (–16, 0) | 0.044 | 2 (–10, 16) | 0.703 |
| 7–12 months | 101 | –29 (–41, –13) | 0.001 | –24 (–34, –13) | 0.000 | –18 (–27, –8) | 0.001 | –13 (–27, 4) | 0.125 |
| > 12 months | 27 | –41 (–57, –17) | 0.002 | –39 (–52, –23) | 0.000 | –24 (–37, –7) | 0.007 | –15 (–37, 15) | 0.298 |
| Continuous (per month) | 633 | –3 (–5, –2) | 0.000 | –3 (–3, –2) | 0.000 | –2 (–2, –1) | 0.000 | –1 (–2, 0) | 0.08 |
| Estimates were based on models of maternal lnPFAA concentrations adjusted for parity (0, 1, 2, > 2), maternal age (categorical in 5-year intervals), and infant´s age (categorical in 6-month intervals). PFOA models were also adjusted for water district. | |||||||||