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. 2012 Jun 29;7(6):e39085. doi: 10.1371/journal.pone.0039085

Table 1. Distribution of the McIsaac scores and corresponding frequencies of positive results of rapid antigen detection test (RADT), group A streptococcus (GAS) and heavy GAS inocula (N  = 785).

n (%)
McIsaacscorea Total RADT-positive GAS-positiveb Heavy inoculumc
1 12 (1) 2/12 (17) 3/12 (25) 2/3 (67)
2 103 (13) 21/103 (20) 25/103 (24) 20/25 (80)
3 262 (33) 82/262 (31) 89/262 (34) 73/89 (82)
4 286 (36) 115/286 (40) 114/286 (40) 100/114 (88)
5 122 (16) 54/122 (44) 54/122 (44) 48/54 (89)
a

All scores were ≥1 because all included patients were 3 to 15 years old.

b

Laboratory throat culture positive for GAS.

c

p  = 0.09, χ2 test for trend for the frequency of heavy inoculum by McIsaac score.