The results for difference in differences analysis. Comparisons were made between pre-pandemic period 3 (October 2019 to March 2020) and the pandemic period (April 2020 to September 2020) ("exposure arm") with delayed visits between pre-pandemic period 1 (October 2018 to March 2019) and pre-pandemic period 2 (April 2019 to September 2019) ("control arm"). Variables used for adjustment were age, sex, income, qualification, and medications.

The results for difference in differences analysis. Comparisons were made between pre-pandemic period 3 (October 2019 to March 2020) and the pandemic period (April 2020 to September 2020) ("exposure arm") with delayed visits between pre-pandemic period 1 (October 2018 to March 2019) and pre-pandemic period 2 (April 2019 to September 2019) ("control arm"). Variables used for adjustment were age, sex, income, qualification, and medications.

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The aim of this study was to investigate the effect of the COVID-19 pandemic on regular clinic visits among people with diabetes and to elucidate the factors related to visit patterns among these patients during the pandemic. This was a longitudinal study using anonymized insurance claims data from the Joint Health Insurance Society in Tokyo from O...

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... using a random-effects model showed an adjusted OR for irregular visits in the pandemic period of 3.45 (95% CI 2.21 to 5.40; P < .001), which was similar to the main results. Regarding the results for difference in differences, there was a significant difference between the control arm and the exposure arm (β .035, 95% CI .012 to .057; P=.002) (Fig. 4); this result was consistent with our other ...