Table 3

Predictors of physician documentation of advice

Variable	n	Proportion of physicians documenting advice	Standard error	Degrees of freedom	F	p Value
Patient sex
Female	346	0.498	0.026	1, 641	5.61	0.0181
Male	302	0.407	0.028

Hospital
A	103	0.382	0.048	3, 641	10.24	0.0001
B	304	0.401	0.028
C	141	0.452	0.041
D	100	0.715	0.048

Length of hospital stay	648	0.0141/day^3-150	0.005/day	1, 641	4.69	0.0308

Smoking related disease
Yes	320	0.492	0.027	1, 641	3.45	0.0639
No	328	0.421	0.027

↵3-150 With each day in the hospital, the proportion of physicians documenting advice increased by this amount.