Table 1. Chi-square tests for proton pump inhibitor status at the patient level.

	Value	Asymp Sig. (twosided)	Exact Sig. (twosided)	Exact Sig. (onesided)
Pearson chi-square test	4.387	0.036
Continuity correction1	1.914	0.166
Likelihood ratio	2.668	0.102
Fisher's exact test			0.094	0.094
Linear-by-linear association	4.38	0.036
No. of valid cases	592

(Asymp: asymptotic, Sig.: significance)

¹Computed only for a 2×2 table.