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Table 4 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 (Low-income patients)

From: 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

 

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*

0.0008

<.0001

0.0067*

0.0006

<.0001

Intervention

 Yes

0.0052

0.003

0.0854

−0.0488

0.0307

0.1114

−0.0801*

0.0241

0.0009

 No

Ref.

-

-

Ref.

-

-

Ref.

-

-

Trend after intervention

−0.0002

0.0003

0.5126

−0.0066*

0.0032

0.0398

0.0039

0.0025

0.1256

  1. *: p-value < 0.05; All covariates are adjusted