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Table 3 Demographics of participants in an observational research bronchoscopy study

From: Motivation and response rates in bronchoscopy studies

Variable All, n = 249 Control, n = 103 COPD, n = 130 Asthma, n = 16
Age (SD) 66.3 (8.3) 65.3 (8.6) 67.2 (7.3) 65.5 (12.6)
Sex (men) 143 (57.4) 60 (58.3) 76 (58.5) 7 (43.8)
Number of medications (SD) 3.8 (3.2) 1.8 (1.7) 5.4 (3.3) 3.6 (2.4)
Number of comorbidities (SD) 1.1 (1.1) 0.8 (1.0) 1.4 (1.2) 0.8 (0.9)
FEV1, % of predicted (SD) 78.3 (28.2) 103.9 (12.3) 56.5 (19.2) 90.7 (13.3)
FVC, % of predicted (SD) 102.7 (18.7) 111.7 (13.5) 95.0 (19.2) 107.5 (16.5)
FEV1/FVC-ratio (SD) 0.6 (0.2) 0.7 (0.1) 0.5 (0.1) 0.7 (0.1)
Pack/years (SD)a 28.6 (20.1) 21.6 (16.9) 33.7 (20.5) 20.9 (22.0)
Smoking status (%)
 Daily 55 (22.1) 25 (24.3) 30 (23.1) 0 (0.0)
 Ex-smokers 170 (68.3) 59 (57.3) 99 (76.2) 12 (75.0)
 Never 24 (9.6) 19 (18.5) 1 (0.8) 4 (25.0)
Marital status (%)a
 Married/partner 157 (64.3) 79 (77.5) 72 (57.1) 6 (37.5)
 Widowed 22 (9.0) 3 (2.9) 16 (12.7) 3 (18.8)
 Cohabitant 20 (8.2) 5 (4.9) 13 (10.3) 2 (12.5)
 Divorced, lives alone 33 (13.5) 11 (10.8) 17 (13.5) 5 (31.3)
 Single 12 (4.9) 4 (3.9) 8 (6.4) 0 (0.0)
Education (%)a
 Primary school 48 (19.8) 12 (11.8) 35 (27.8) 1 (6.7)
 Upper secondary/high school 125 (51.4) 52 (51.0) 67 (53.2) 6 (40.0)
 3 years or more of higher education 70 (28.8) 38 (37.3) 24 (19.1) 8 (53.3)
mMRC Grade 2 and higher (%)
 Grade 2 level ground 30 (54.6) 3 (100) 27 (52.9) 0 (0.0)
 Grade 3100 m 18 (32.7) 0 (0.0) 17 (33.3) 1 (100)
 Grade 4 resting dyspnoea 7 (12.7) 0 (0.0) 7 (13.7) 0 (0.0)
  1. FEV1 Forced Expiratory Volume in 1 Second, FVC Forced Vital Capacity, and mMRC modified Medical Research Council dyspnoea scale
  2. aDue to some missing information, the sum of participants is not 249