In Model 2, the coefficient of ‘Post×Treat’ is highly significant and negative (−0.0267, 95% CI −0.0337 to −0.0197), indicating that the policy was associated with the decrease in the probability of choosing secondary/tertiary healthcare instead of primary healthcare.
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Impact of differential copayment on patient healthcare choice: evidence from South Korean National Cohort Study.
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The sentences
They found that the impact was too small to be practically significant.