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Data quality check distribution.
| Items | Frequency/percentage |
|---|---|
| The questionnaires sent to the study participants | 5,600 (100.0%) |
| Questionnaire responded by the study participants | 5,450 (97.32%) |
| Questionnaire not responded | 150 (2.68%) |
| Incomplete excluded questionnaire | 99 (1.77%) |
| The questionnaire included in the final data analysis | 5,351 (95.55%) |
