Deregulation of sale of over-the-counter drugs outside of pharmacies in the Republic of Korea: interrupted-time-series analysis of outpatient visits before and after the policy

Table 5 Interrupted time series analysis of the effect of the over-the-counter drug policy on number of monthly outpatient visits for acute upper respiratory infections, dyspepsia, and migraine (High-income patients)

	Acute upper respiratory infections			Dyspepsia			Migraine
	Estimation	Standard error	p-value	Estimation	Standard error	p-value	Estimation	Standard error	p-value
Trend	−0.0003*	0.0001	<.0001	0.0102*	0.0006	<.0001	0.0053*	0.0004	<.0001
Intervention
Yes	0.0014	0.0021	0.4997	−0.0083	0.0248	0.7362	0.001	0.0199	0.9614
No	Ref.	-	-	Ref.	-	-	Ref.	-	-
Trend after intervention	0.0004	0.0002	0.0824	−0.0078*	0.0027	0.0036	−0.0005	0.0023	0.8152

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