Fig. 2

ROC curve of clinical prediction rules for cystitis. Receiver Operating Characteristic Curve (ROC) analysis showing sensitivity versus 1-specificity at each threshold. The thresholds for a positive rule are shown next to each point on the graph. Each colour represents the diagnostic test accuracy of one prediction rule for urinary tract infection in children. Confidence intervals of the estimates (sensitivities) are indicated as dashed lines. p = points; DUTY = diagnosis of urinary tract tractions in young children; CC = clean catch samples; NP = nappy pad samples; UTI = urinary tract infection; PCT = procalcitonin; ANC = absolute neutrophil count; NICE = National Institute for Health and Care Excellence; LE = Leucocyte Esterase, N = Nitrite, WBCu = urine white blood cells, B = urine bacteria, hpf = high power field, μl = microliter, ng = nanogram, ml = milliliter, derivation studies are indicated with an asterisk (*)