Diagnostic accuracy of administrative data algorithms in the diagnosis of osteoarthritis: a systematic review

Table 3 Medians and ranges of diagnostic characteristics of administrative data algorithms

Algorithm restrictiveness	Reference standard	No of algorithms	Median sensitivity	Sensitivity range	Median specificity	Specificity range	Median positive likelihood ratio	Positive likelihood ratio range	Median PPV at 10 % prevalence	Median PPV at 25 % prevalence	Median PPV at 50 % prevalence
Restrictive	Self-report	4	0.33	0.29–0.43	0.92	0.89–0.94	5.05	2.64–5.50	0.36	0.62	0.84
Restrictive	ACR criteria	1	0.31	NA	0.89	NA	2.82	NA	0.24	0.48	0.74
Less restrictive	Physician diagnosis	4	0.54	0.32–0.78	0.95	0.94–1.00	12.75	6.40–15.25	0.58	0.80	0.92
	Self-report	2	0.55	0.50–0.61	0.79	0.70–0.89	3.23	2.03–4.42	0.26	0.50	0.74
	ACR criteria	2	0.71	0.58–0.83	0.63	0.60–0.66	1.91	1.71–2.10	0.18	0.39	0.65

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