The authors regret that the article was published with typos in Results Section 3.4. Effects of prenatal CO on birth outcomes: several negative signs were missing in the text reporting the confidence intervals for the results for the overall cohort.
The results for birth weight, birth length, and weight-for-age Z score all reached statistical significance at the p < 0.05 level, with 95% confidence intervals that did not cross zero: these findings were correctly reported in Table 3. The text that refers to Table 3 should correctly read as follows: “In the overall cohort, each 1 ppm increase in maternal exposure to CO during pregnancy was associated with a mean [95% CI] reduction of −38.7 [−66.2, −11.1] g in birth weight, −0.3 [−0.5, −0.02] cm in birth length, −0.5 [−1.3, −0.2] days of gestational age, and 0.07 [−0.1, −0.01] standard deviation of weight-for-age Z score (Table 3) in adjusted analyses.”
The authors would like to apologise for any inconvenience caused.