Table 2.

Incidence of molluscum contagiosum, and sensitivity, specificity, positive predictive value, and negative predictive value for the Molluscum Contagiosum Diagnostic Tool for Parents

a) All participants regardless of confidence in diagnosis (n = 203)
%95% CI
Incidence of MC30.5 (n = 62)22.9 to 35.8
Sensitivity91.581.3 to 97.2
Specificity88.281.8 to 93.0
Positive predictive value76.164.5 to 85.4
Negative predictive value96.291.4 to 98.8
b) Participants who indicated they were ‘very confident’ or ‘confident’ in their diagnosis (n = 158)
%95% CI
Incidence of MC30.4 (n = 48)23.3 to 38.2
Sensitivity95.885.7 to 99.5
Specificity90.983.9 to 95.6
Positive predictive value81.269.9 to 91.1
Negative predictive value98.093.1 to 99.8
  • MC = molluscum contagiosum.