Table 2.

Results of Logistic Regression Analysis (n = 37)

Variable	B	SE	df	Wald	Significance	Exp(B)	Exp(B) (95% CI)
Constant	135.35	108.24	1	1.56	0.21	0.00	—
Country	−0.73	0.92	1	0.63	0.43	0.48	0.08–2.94
Year	−0.07	0.05	1	1.57	0.21	0.94	0.84–1.04

B, beta for the regression coefficients of the logistic regression; SE, standard error of the regression coefficients; df, degrees of freedom; Wald statistic calculated as the ratio of B to the SE and then squaring the result; Exp(B), odds ratio; 95% CI for Exp(B), 95% confidence interval for the odds ratio.