Background: Every disorder in any developmental stage will result in alteration of the quality of human resources in the future. Early detection is an effort to recognize disorders in every developmental stage. Parents’ concern can be helpful in identifying children in need of assessment and can be used as a prescreening test to reduce the number of children who require formal screening.

Objective: The objective of this study was to examine diagnostic value of PEDS^® instrument in order to determine developmental disorders in infant.

Methods: It was carried out in Department of Child Health, Medical School, Udayana University/Sanglah Hospital, Denpasar. In this study, 170 infants, 3-12 month old infant who visited Pediatric Outpatient Clinic and eligible for inclusion and exclusion criteria were selected as sample. The parents filled the PEDS^® questionnaire and the results of PEDS^® were compared with the results of BSID-II as a gold standard. The main statistical analyses are sensitivity, specificity, positive predictive value, negative predictive value, positive and negative likelihood ratio, and pre-test and post-test probability.

Results: PEDS^® showed a sensitivity of 83.9% (95% CI 67.8 to 93.8), a specificity of 81.3% (95% CI 74.2 to 87.1), a positive predictive value of 50.0% (95% CI 40.6 to 59.4), a negative predictive value of 95.8% (95% CI 91.2 to 98.0), a likelihood ratio positive of 4.5 (95% CI 3.1 to 6.6), a likelihood ratio negative of 0.2 (95% CI 0.1 to 0.4), a pre-test probability of 18.2% and a post-test probability of 49.9% (95% CI 40.6 to 59.3).

Conclusions: PEDS^® can be used as an initial screening test to detect developmental disorders in 3-12 month infants