Table 6.

Analysis of ratings and comments for high- and low-volume surgeons.

		Surgeon volumes									Analysis of variance
		All		Bariatric		Lumbar		Knee		Volumea		Procedureb		Interactionc
		HV	LV	HV	LV	HV	LV	HV	LV	F	P	F	P	F	P
Surgeons with ratings
	N=	547		170		182		195		F1,541		F2,541		F2,541
	Mean ratings/ websited (SD)	5.85 (3.92)	4.57 (3.29)	4.40 (3.22)	3.70 (2.53)	7.49 (4.29)	5.39 (3.97)	5.60 (3.58)	4.63 (3.02)	18.33	<.001	20.73	<.001	1.88	.15
	Overall rating scoree	0.07 (0.74)	-0.00 (0.84)	0.35 (0.68)	0.19 (0.90)	-0.14 (0.75)	-0.10 (0.85)	0.03 (0.69)	-0.07 (0.77)	1.21	.27	11.98	<.001	0.74	.48
Surgeons with comments
	N=	385		101		147		137		F1,379		F2,379		F2,379
	Mean comments/ websited (SD)	2.74 (1.95)	2.30 (2.05)	2.03 (1.30)	1.78 (1.36)	3.07 (2.00)	2.74 (2.44)	2.87 (2.15)	2.25 (2.01)	3.82	.05	7.72	.001	0.30	.74

^a Comparing high- versus low-volume surgeons

^b Comparing bariatric, lumbar, and knee surgeons

^c Comparing high- versus low-volume surgeons across surgeon categories

^d Only includes individual websites on which doctor had at least one rating/comment

^e z score