IQR, interquartile range.
^{a}Base scenario estimates are based on OR of 1.15; low and high scenario estimates are based on ORs of 1.07 and 1.16, respectively. For calculations, please see “Methods.”
^{b}Median RR estimated using the MEDIAN function in Excel (Microsoft).
^{c}Lost economic productivity due to reduced cognitive potential was measured as an indirect cost of PM_{2.5}-attributable PTB. PTB-associated IQ loss was calculated using data from a systematic review that estimates an 11.9-point IQ decrement on average in PTB children (95% CI: 10.5, 13.4). See “Methods.”
^{d}Two types of direct costs of PTB were estimated: costs for treatment of PTB-associated medical conditions in the first 5 years of life, and costs after the first 5 years of life due to PTB-associated developmental disability. See “Methods.” |