Table 4.

Likelihood that year of publication predicts proportion of positive responses using a generalized linear model.

	Coefficient	Standard Error	Z	P> Z	95% Confidence Interval
Year	0.167	0.0282	0.59	0.554	−0.0386 – 0.0720
Constant	−32.88	56.66	−0.58	0.562	−143.9 – 78.2