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Table 3 Multiple linear regression model for mean birth weight of cooking fuel types

From: Exposure to cooking fuels and birth weight in Lanzhou, China: a birth cohort study

Fuel type N Mean ± SD(g) Difference from gasa(g) 95 % CI
Gas 7907 3310.66 ± 499.16 0.00  
Coal 358 2970.40 ± 709.54 -73.31 -119.77 to -26.86
Biomass 120 2804.96 ± 803.89 -87.84 -164.46 to -10.76
Electromagnetic 487 3150.22 ± 613.10 -30.20 -69.02 to 8.63
  1. aAdjusted for maternal age, education, and family income, and maternal weight gain, vitamin supplement during pregnancy, preeclampsia, caesarean section, parity, gestational week, smoking, and ventilation