| evaluation and simplification of the world health organization clinical case definition for paediatric aids. | the world health organization (who) clinical case definition for paediatric aids was tested during a 1-month period on 221 consecutive hospitalized children in kigali, rwanda. relevant clinical features not included in the who case definition were also evaluated. thirty-four out of the 221 children (15.4%) were hiv seropositive. although the specificity of the who case definition was high (92%), the sensitivity and the positive predictive value (ppv) were low (41 and 48%, respectively). the foll ... | 1989 | 2500955 |