Specialty Group
	OB/GYN	URO	DERM	Overall
Number of physicians in study sample	28	40	35	.
Number of patients reported on two-week daily log	4447	5616	5898	15 961
Mean N of patients reported on two-week daily log	158.8	140.4	168.5	.
Patient distribution in two-week daily log	0.2786	0.3519	0.3695	1.0000
Observed GW cases	441	466	462	1369
Sample prevalence (per 100 000 population)	9916.798	8297.721	7833.164	8577.157
Number of physicians at national levela	24 000	6000	9600	.
Number of patients at national level	3 811 714	842 400	1 617 737	.
Distribution of patients at national level	0.6077	0.1343	0.2579	.
Estimated prevalence (per 100 000 population)b	9916.798	8297.721	7833.164	9161.888
Standard errorb	448.2023	368.0916	349.8675	432.1853
95% Confidence intervalb	(9038.321, 10 795.27)	(7576.261, 9019.180)	(7147.424, 8518.904)	(8314.805, 10 008.97)