Table 5

Number of study participants, number admitted, sensitivity, specificity, predictive values and likelihood ratios at low, moderate, high and very-high-risk categories for the original Pra and modified Pra

Risk categoryNumber of participants (n)≥1 emergency admission (n)Sensitivity (%)Specificity (%)PPV (%)NPV (%)LR+LR−
Original Pra
 Low risk (0–0.34)569731000181.0
 Moderate risk (0.35–0.49)22655537028871.70.7
 High risk (0.5–0.69)6225179541843.20.9
 Very high risk (≥0.7)111100100821.0
Modified Pra
 Low risk (0–0.34)198181000181.0
 Moderate risk (0.35–0.49)27333882520911.10.5
 High risk (0.5–0.69)33177675926891.60.6
 Very high risk (≥0.7)6026179543843.50.9
  • LR, likelihood ratio; NPV, negative predictive value; PPV, positive predictive value; Pra, Probability of repeated admission.