Table 1.
Key concepts in current North-American clinical practice guidelines for diagnosis of streptococcal pharyngitis, with corresponding quotes.
Fig 1.
Model-based selective testing strategy.
Abbreviations: GAS, group A streptococcus.
Table 2.
Predictor variables included in the multivariable model.
Fig 2.
Calibration plot of calculated probabilities of group A streptococcus (GAS) and observed outcomes (N = 676).
Circles represent mean calculated probabilities versus observed proportions in subgroups defined by quintiles of the calculated GAS probabilities (m = 1). Vertical bars are 95% confidence intervals. Dashed diagonal line represents perfect calibration.
Fig 3.
Distribution of calculated probabilities of group A streptococcus (GAS) when applying the clinical prediction model.
The vertical dashed lines represent thresholds used to define low and high probability of GAS (calculated probability of GAS<0.12 and >0.85, respectively). The vertical black line represents disease prevalence (0.41).