Table 4.

Expected number compared with observed for each category of indicators, by cluster

	Quality indicators	Cluster
		High (n=659, 38%)			Moderate (n=184, 11%)			Low (n=286, 17%)			None (n=595, 35%)
		E	O	∆	E	O	∆	E	O	∆	E	O	∆
Pain assessment	Assessed (n=1092, 63%)	645	645	0	177	177	0	264	263	1	8	7	1
	Not assessed (n=632, 37%)	14	14	0	7	7	0	22	23	−1	587	588	−1
Function assessment	Assessed (n=1070, 62%)	646	646	0	176	174	2	250	250	0	0	0	0
	Not assessed (n=655, 38%)	13	13	0	8	10	−2	36	36	0	595	595	0
OA information	Given (n=764, 44%)	613	620	−7	85	59	26	91	85	6	0	0	0
	Considered, not given (n=85, 5%)	6	3	3	61	81	−20	3	1	2	0	0	0
	Not considered (n=875, 51%)	41	36	5	38	44	−6	192	200	−8	595	595	0
Exercise advice	Given (n=768, 45%)	655	658	−3	77	53	24	68	57	11	0	0	0
	Considered, not given (n=96, 6%)	4	1	3	58	77	−19	19	18	1	0	0	0
	Not considered (n=860, 50%)	0	0	0	50	54	−4	199	211	−12	595	595	0
Weight advice	Given (n=536, 31%)	391	370	21	21	20	1	26	22	4	0	0	0
	Considered, not given (n=153, 9%)	196	213	−17	135	140	−5	99	99	0	262	262	0
	Not considered (n=1035, 60%)	72	76	−4	28	24	4	161	165	−4	333	333	0
Topical NSAID or paracetamol	Prescribed (n=609, 35%)	314	311	3	50	47	3	113	111	2	142	140	2
	Considered, not prescribed (n=570, 33%)	327	330	−3	118	119	−1	116	118	−2	2	3	−1
	Not considered (n=545, 32%)	18	18	0	16	18	−2	57	57	0	450	452	−2
Physiotherapy	Referred (n=124, 7%)	73	69	4	7	6	1	29	30	−1	19	19	0
	Considered, not referred (n=532, 31%)	369	371	−2	135	147	−12	23	14	9	0	0	0
	Not considered (n=1068, 62%)	218	219	−1	42	31	11	234	242	−8	576	576	0

E, expected number; NSAID, non-steroidal anti-inflammatory drug; O, observed number; OA, osteoarthritis; ∆, difference.