. 2019 Oct 11;26(31):32360–32367. doi: 10.1007/s11356-019-06478-z

Table 3.

Estimates of conventional drilling on infants’ health (2006–2017)

Variables	0–1 km	1–5 km	5–10 km	10–20 km
Dependent variable: total birth weight
Distance	− 0.012	− 0.005	− 0.001	− 0.000
Distance	[0.20]	[0.34]	[0.46]	[0.68]
Mother’s age	− 0.196**	− 0.201**	− 0.224**	− 0.230**
Mother’s age	[0.05]	[0.05]	[0.04]	[0.03]
Mother’s education	0.286***	0.309***	0.311***	0.307***
Mother’s education	[0.00]	[0.00]	[0.00]	[0.00]
Mother’s ethnicity/race	0.038	0.044	0.049	0.053
Mother’s ethnicity/race	[0.40]	[0.32]	[0.28]	[0.24]
Child parity	0.302***	0.319***	0.166***	0.225***
Child parity	[0.00]	[0.00]	[0.01]	[0.00]
R-squared adjusted	0.32	0.28	0.23	0.18
Dependent variable: low birth weight
Distance	0.011	0.006	0.000	0.000
Distance	[0.29]	[0.40]	[0.57]	[0.72]
Mother’s age	0.162**	0.174**	0.183**	0.179**
Mother’s age	[0.05]	[0.05]	[0.04]	[0.04]
Mother’s education	− 0.629***	− 0.691***	− 0.654***	− 0.680***
Mother’s education	[0.00]	[0.00]	[0.00]	[0.00]
Mother’s ethnicity/race	0.036	0.041	0.033	0.038
Mother’s ethnicity/race	[0.39]	[0.34]	[0.42]	[0.37]
Child parity	− 0.329***	− 0.286***	− 0.198**	− 0.126*
Child parity	[0.00]	[0.01]	[0.03]	[0.06]
R-squared adjusted	0.41	0.37	0.39	0.31
Dependent variable: health index
Distance	− 0.032**	− 0.017	− 0.013	− 0.008
Distance	[0.05]	[0.12]	[0.20]	[0.29]
Mother’s age	− 0.658***	− 0.642***	− 0.589***	− 0.542***
Mother’s age	[0.00]	[0.00]	[0.00]	[0.00]
Mother’s education	0.705***	0.674***	0.627***	0.591***
Mother’s education	[0.00]	[0.00]	[0.00]	[0.00]
Mother’s ethnicity/race	0.047	0.034	0.023	0.014
Mother’s ethnicity/race	[0.39]	[0.50]	[0.63]	[0.81]
Child parity	0.427***	0.368***	0.311***	0.204**
Child parity	[0.00]	[0.00]	[0.00]	[0.04]
R-squared adjusted	0.50	0.44	0.39	0.32

Figures in brackets denote p values. Standard errors are clustered on ZIP levels

***p ≤ 0.01

**p ≤ 0.05

*p ≤ 0.10