Table 2.

Effect of travel direction on the impact of jet lag on home offensive performance

	Home jet lag
Offense	West	West P value	Average	East	East P value
At-bats	0.218 ± 0.138	0.113	33.497 ± 0.019	−0.141 ± 0.16	0.38
Singles	0.047 ± 0.088	0.7035	6.017 ± 0.012	−0.01 ± 0.103	0.46
Doubles	−0.015 ± 0.045	0.369	1.769 ± 0.006	−0.146 ± 0.053	0.003^*
Triples	−0.003 ± 0.015	0.4295	0.205 ± 0.002	−0.031 ± 0.018	0.037^*
Home runs	0.001 ± 0.035	0.525	1.033 ± 0.005	−0.01 ± 0.041	0.4
Walks	0.054 ± 0.071	0.777	3.435 ± 0.010	0.028 ± 0.083	0.6345
Strikeouts	0.057 ± 0.089	0.2595	6.202 ± 0.013	−0.05 ± 0.103	0.686
Stolen bases	−0.04 ± 0.031	0.0995	0.634 ± 0.004	−0.062 ± 0.036	0.0425^*
Caught stealing	−0.032 ± 0.017	0.9725	0.262 ± 0.002	−0.002 ± 0.02	0.531
Stolen base attempts	−0.072 ± 0.036	0.022^*	0.896 ± 0.005	−0.063 ± 0.041	0.0635
Sacrifice hits	−0.008 ± 0.02	0.349	0.348 ± 0.003	0.01 ± 0.023	0.674
Sacrifice flies	−0.011 ± 0.018	0.2685	0.295 ± 0.003	0.002 ± 0.021	0.5455
Grounded into double plays	0.032 ± 0.028	0.1235	0.762 ± 0.004	0.062 ± 0.032	0.0285^*

Home jet lag shows regression coefficients indicating effects on home offensive performance. Regression coefficients are adjusted for team effects. Parameters are expressed on a per-game basis with error indicating SE of the estimated effect. P values are one tailed, derived from the regression analysis testing whether jet lag adversely impacts performance.
↵* Metrics where P < 0.05. Average is over all 46,535 games.