Predicting streptococcal pharyngitis in adults in primary care: a systematic review of the diagnostic accuracy of symptoms and signs and validation of the Centor score

Table 4 Post-test probability of group A β-haemolytic streptococcal (GABHS) pharyngitis

Points	Likelihood ratio	Pretest probability of GABHS pharyngitis (%)
		5	10	15	20	25	30	35	40
≥ 1	1.16	6	11	17	22	28	33	38	44
≥ 2	1.76	8	16	24	31	37	43	49	54
≥ 3	2.68	12	23	32	40	47	53	59	64
4	3.85	17	30	40	49	56	62	67	72

ISSN: 1741-7015