Relationship between Smoking and Acute Mountain Sickness: A Meta-Analysis of Observational Studies

Table 4

Results of sensitivity analyses for AMS risk by smoking status.

ID	Study omitted	Pooled RR (95% CI)	Heterogeneity
			(1)	Wu et al., 2012	1.07 (0.85, 1.34)	70.0%	<0.001
(2)	Li et al., 2011	1.02 (0.78, 1.32)	76.0%	<0.001
(3)	Wagner et al., 2008	1.01 (0.80, 1.27)	73.0%	<0.001
(4)	You et al., 2012	1.10 (0.92, 1.32)	59.0%	0.002
(5)	Vinnikov et al., 2014	0.98 (0.80, 1.21)	73.0%	<0.001
(6)	McDevitt et al., 2014	0.97 (0.78, 1.19)	67.0%	<0.001
(7)	Mairer et al., 2009	1.01 (0.81, 1.26)	76.0%	<0.001
(8)	Mairer et al., 2010 (Eastern Alps)	1.02 (0.82, 1.27)	76.0%	<0.001
(9)	Mairer et al., 2010 (Western Alps)	1.04 (0.84, 1.29)	75.0%	<0.001
(10)	Schneider et al., 2001 (sub-study 1)	1.02 (0.81, 1.28)	76.0%	<0.001
(11)	Schneider et al., 2001 (sub-study 2)	1.04 (0.83, 1.31)	75.0%	<0.001

AMS: acute mountain sickness; CI: confidence interval; RR: relative risks. Relative risks were obtained using the DerSimonian and Laird random-effect model.