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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: Environ Res. 2018 Oct 29;168:460–466. doi: 10.1016/j.envres.2018.10.032

Table 4.

ORs (95% CI) for preterm birth for an IQR increase (5.5°C) in heat index during whole pregnancy, stratified by combinations of individual- and community-level SES

Community-level SESa Individual-level SESb
Low High
Low 1.100 (1.032, 1.173) 1.019 (0.972, 1.069)
High 0.973 (0.904, 1.048) 1.031 (0.986, 1.077)
a

Community-level SES was based on local taxes including income tax, automobiles tax, and property tax of each gu level.

b

Individual-level SES was based on mother’s education level.