Additional file 2 of The effect of shifting medical coverage from National Health Insurance to Medical Aid type I and type II on health care utilization and out-of-pocket spending in South Korea

Additional file 2: Table S1. Estimated Average Health Care Utilization and Out-of-pocket Medical Spending Difference in Medical Aid Type I panel by difference-in-differences analysis. Abbreviation: Medical Aid, MA, National Health Insurance, NHI, Confidence Interval, CI. * Log Link with Zero-Inflated Negative Binomial Distribution was applied in the regression analysis because of exceess zeros in the outcomes. a Models additionally adjusted for individuals’ health related characteristics (mostly visited type of medical institution, lasted period of chronic disease). b Propensity score matched for sex, age, region, equivalized household disposable income, marital status, economic activity status, number of private insurance, expenditure on private insurance.