After data quality check, inclusion criteria were not satisfied and data quality was poor. We concluded that results are not reliable

A cross-sectional conductive study aiming to evaluate the accuracy of a novel smartphone application that estimates bilirubin levels in newborns in Surabaya.

A cross-sectional conductive study aiming to evaluate the accuracy of a novel smartphone application that estimates bilirubin levels in newborns at Airlangga University hospital and RSIA Kendangsari MERR in Surabaya.

This cross-sectional study evaluates the accuracy of a novel smartphone application that estimates bilirubin levels in Indonesian newborns. The Picterus Calibration Card was placed on the chest of the newborn with the hole in the card placed over the infant's sternum. A validated smartphone with Picterus JP was used to collect digital images.

Inclusion Criteria:

• Infants born with gestational age >31
• Birth weight ≥ 1500g
• Age 0 - ≤14 days
• Consent obtained from the parents

Exclusion Criteria:

• Infants born with congenital abnormalities;
• Infants respiratory support;
• Infants suffering from a condition that may alter the skin tissue circulatory system, such as sepsis and heart failure;
• Infants who have received phototherapy in the last 24 hours.