Evaluation of Bili-ruler, a Low-cost, Plastic Icterometer for Community-based Screening of Jaundice in Newborns

Neonatal jaundice, or accumulation of bilirubin molecules in blood, places newborns at risk of brain damage and death. Hyperbilirubinemia, or severe bilirubin levels above approximately 15 mg/dL, is a secondary outcome in the PRISMA MNH study. Newborn jaundice accounted for 13.09 deaths per 100,000 in 2016, and the burden is highest in South Asia and sub-Saharan Africa, where neonatal jaundice is the 7th and 8th leading cause of newborn mortality, respectively. Universal screening is recommended, but the standard of care, visual inspection of the skin and sclera, has a low sensitivity of 42%. Transcutaneous bilirubinometers are promising noninvasive, handheld tools, but they are expensive (> $3000) and inaccurate in newborns with darker skin. In low-and-middle-income countries, as well as in rural settings, guardians and clinicians often fail to identify at-risk newborns due to a lack of appropriate, affordable, and accurate screening tools. The bili-ruler is a $10 ruler with six shades of yellow, which could enable jaundice screening with high sensitivity in diverse settings such as homes, mobile clinics, and rural areas.

In this study, we will evaluate jaundice in newborns using three noninvasive techniques: bili-ruler, visual inspection, and transcutaneous bilirubinometry (a handheld device). The goals are to determine whether the six bili-ruler shades of yellow can be accurately correlated with bilirubin levels measured by a transcutaneous device, as well as to evaluate whether many users from various backgrounds can easily use bili-ruler to obtain comparable measurements. Additionally, limited evidence exists on the progression of jaundice and the performance of noninvasive screening tools in premature newborns and in newborns with various skin tones, especially darker skin tones. We seek to address this gap by utilizing an existing multi-site, international collaboration (the Pregnancy Risk, Infant Surveillance, and Measurement Alliance, or PRISMA) and enrolling large, diverse study populations. This study is nested in the PRISMA Maternal and Newborn Health (MNH) study, which is an open-cohort study that assesses pregnancy risk factors and associated maternal and infant outcomes in six study sites in five countries. All six study sites, located in Ghana, Zambia, Kenya, Pakistan, and India, will participate and collect bilirubin and jaundice-related data at four time points (0-3, 3-5, 5-7, and 7-14 days of life). The investigators will evaluate agreement between the three methods and agreement between bili-ruler measurements taken by two independent users. The investigators will additionally evaluate the impact of gestational age and skin tone on the accuracy of bili-ruler. Finally, the investigators will assess factors that influence bilirubin measurements.