Table 3.

The Effect of a 10-Percentage Point Increase in PCP Booking Density on the Rate of ER Visits Among that PCP’s Patients

	Among all PCPs			Among PCPs whose patients rarely see non-assigned PCPs
	(n = 6,398)			(n = 2,527)
	IRR	95 % CI	P value	IRR	95 % CI	P value
Total ER visits	1.002	(0.999 to 1.006)	0.15	1.005	(0.999 to 1.010)	0.08
Weekday ER visits	1.003	(0.999 to 1.007)	0.13	1.006	(1.000 to 1.012)	0.07
Weekend ER visits	0.999	(0.993 to 1.006)	0.80	1.002	(0.991 to 1.013)	0.72
Primary care treatable ER visits	1.003	(0.998 to 1.008)	0.19	1.010	(1.002 to 1.018)	0.02