1. Flow diagram of participants included in the survey. aResponse rate
Flow diagram of participants included in the survey. aResponse rate. bActual response rate (participants included in the analysis and had completed all sections that comprised questionnaire, physical measurements and tests during the second resurvey). cChro...
Flow diagram of participants included in the survey. aResponse rate. bActual response rate (participants included in the analysis and had completed all sections that comprised questionnaire, physical measurements and tests during the second resurvey). cChronic obstructive pulmonary disease (COPD) defined by history of doctor diagnosis of COPD=COPD and/or chronic bronchitis and/or emphysema. dSymptom-based COPD are those with self-reported chronic cough, that is, productive cough for at least 3 months for 2 consecutive years.
Om P Kurmi et al. BMJ Open Resp Res 2018;5:e000267
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