Table 1 Characteristics of participants (n = 185)

Characteristics of participants

Sex (men/women)

171/14

Age (years)

78.5 ± 6.1

Pneumoconiosis supervision class (2/3/4)

129/48/8

Personal factors

Pulmonary rehabilitation experience (Yes/No)

18/167

Pulmonary rehabilitation recognition

52/86/11/23/13

(I do not know at all/I do not know much/I cannot say either/I know a little/I know well)

Smoking history

(current-smoker/former-smoker/non-smoker)

8/128/62

Subjective symptoms

Dyspnea (mMRC Grade 0/1/2/3/4)

85/53/35/10/2

QOL (CAT 0–40 points)

11 (18–6)

Physical activities

Total score (Mets min/week)

876 (2970–198)

Category classification (low/moderate/high)

86/52/47

Psychological factors

Depression (SDS 20–80 points)

49 (52–44)

Stage of change

49/9/6/12/109

(precontemplation, contemplation, preparation, action, maintenance)

14 (18–10)