목적: 1.To study risk factor for loss to follow up in referred cases from newborn hearing screening 2.To study effectiveness of newborn hearing screening in Songkhlanagarind hospital 방법:Data of newborn and their parents was recorded from 1 January ,2022 to 30 November 2024 to perform prospective cohort study. Newborns with referred screening result were given appointment at age of 1 month to repeat screening test. If the hearing screening result was referred again within age of 1 month, they will get appointment to perform diagnostic hearing test within age of 3 months. If there was evidence of hearing loss from diagnostic hearing test, Parents of newborn will get appointment date for hearing rehabilitation within age of 6 months. 결과:There were 7400 newborns in hospital in 3 years. 323 case has referred hearing screening but 220 case volunteered into our study. 97.66% of newborns has complete screening and diagnostic hearing test (JCIH benchmark > 95%). 0.86% of newborns has referred result on second hearing screening (JCIH benchmark < 4%). However, there were only 80.65% of newborn that complete diagnostic hearing(JCIH benchmark > 90%). Fortunately, all 19 newborns with hearing loss received hearing rehabilitation within 6 months. (JCIH benchmark > 90%) There was a significant difference in loss to follow-up (p = 0.047) for newborn of low-income family (< 15,000 baht or less than minimum wage in Thailand) on logistic regression analysis (OR 2.45, 95% CI 1.12-5.36). Birth order showed significant difference (p = 0.050) between normal to follow up and loss to follow up group. However, there was no significant effect on logistic regression analysis. Other risk factors showed no significant difference. 결론:Newborn hearing screening program in Songklanagarind hospital meets 3 out of 4 JCIH quality indicators. The only pitfall in the program is the loss to follow up on the diagnostic hearing test for newborn at age of 3 month. The only significant risk factor for loss to follow up in referred case of newborn hearing screening is low family income. Further interventions are recommended to the newborn with low family income to prevent the rate of loss to follow up.