Skip to main content

Table 3 Characteristics of participants

From: The effect on participation rates of including focused spirometry information in a health check invitation: a cluster-randomised trial in Denmark

  Control participants
N (%)
Intervention participants
N (%)
Total participants
N (%)
Missing
N
Total 1151 (49.5) 1172 (50.5) 2323 (100.0) 0 / 2323
Sex (male) 566 (49.2) 582 (49.7) 1148 (49.4) 0 / 2323
Age groups (years)
 30–34 212 (18.4) 221 (18.9) 433 (18.6) 0 / 2323
 35–39 273 (23.7) 306 (26.1) 579 (24.9)  
 40–44 322 (28.0) 307 (26.2) 629 (27.1)  
 45–50 344 (29.9) 338 (28.8) 682 (29.4)  
Smoking status
 Current smoker 257 (23.0) 264 (23.2) 521 (23.1) 70 / 2323
 Never smoke 601 (53.9) 631 (55.4) 1232 (54.7)  
 Ex-smoker 257 (23.0) 243 (21.4) 500 (22.2)  
Lung symptoms
 All of the time 9 (0.8) 11 (1.0) 20 (0.9) 38 / 2323
 Most of the time 33 (2.9) 27 (2.3) 60 (2.6)  
 Now and then 115 (10.2) 115 (9.9) 230 (10.1)  
 Rarely 332 (29.4) 330 (28.5) 662 (29.0)  
 Not at all 639 (56.6) 674 (58.3) 1313 (57.5)  
Risk profilea
 No risk 872 (75.8) 888 (75.8) 1760 (75.8) 0 / 2323
 Risk 279 (24.2) 284 (24.2) 563 (24.2)  
Lung functionb
 FEV1/FVC < 0.70 147 (13.2) 147 (13.0) 298 (13.1) 79 / 2323
Income, 1000 DKK
 Low (0–207) 307 (26.7) 299 (25.5) 606 (26.1) 0 / 2323
 Middle (208–273) 363 (31.5) 406 (34.6) 769 (33.1)  
 High (274-?) 481 (41.8) 467 (39.8) 948 (40.8)  
Education (years)
 0–10 (low) 139 (12.3) 155 (13.5) 294 (12.9) 40 / 2323
 11–15 (medium) 607 (53.6) 574 (49.9) 1181 (51.7)  
 16+ (high) 387 (34.2) 421 (36.6) 808 (35.4)  
Occupational status
 Employed 946 (82.2) 971 (82.8) 1917 (82.5) 0 / 2323
 Self-employed 50 (4.3) 51 (4.4) 101 (4.3)  
 Unemployed/benefits 27 (2.3) 21 (1.8) 48 (2.1)  
 Social welfare 113 (9.8) 118 (10.1) 231 (9.9)  
 Othersc 15 (1.3) 11 (0.9) 26 (1.1)  
Medicined
Yes 93 (8.1) 90 (7.7) 183 (7.9) 0 / 2323
  1. aRisk of developing lung diseases; current smoker or respiratory symptoms
  2. bFEV1 Forced expiratory volume in 1 s, FVC Forced vital capacity
  3. cOthers include a non-working person from a family relying on one income only
  4. dPurchase of respiratory medicine in the last 2 years