PMC:4536239 / 7408-7720 JSONTXT

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    TEST0

    {"project":"TEST0","denotations":[{"id":"26272681-204-210-1506048","span":{"begin":308,"end":310},"obj":"[\"21901299\"]"}],"text":"We assessed the socioeconomic and demographic characteristics of participants by using a questionnaire. Sleep quality was assessed by the Pittsburgh Sleep Quality Index (PSQI) questionnaire considering total scores of \u003e5 as ‘poor sleep quality’. The Korean translation of PSQI has previously been validated [32]."}

    2_test

    {"project":"2_test","denotations":[{"id":"26272681-21901299-60560341","span":{"begin":308,"end":310},"obj":"21901299"}],"text":"We assessed the socioeconomic and demographic characteristics of participants by using a questionnaire. Sleep quality was assessed by the Pittsburgh Sleep Quality Index (PSQI) questionnaire considering total scores of \u003e5 as ‘poor sleep quality’. The Korean translation of PSQI has previously been validated [32]."}