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 |