Table 1.
Baseline characteristics of participants of the intervention group—overall, general practice and online group.
| Characteristic | Intervention group overall (n=658) |
Intervention group general practice (n=21) |
Intervention group online (n=637) |
P value | |
| Age, years, mean (SD)a | 57.7 (7.3) | 58.6 (8.6) | 57.7 (7.3) | .55 | |
| Male, n (%)b | 326 (49.5) | 11 (52.4) | 315 (49.5) | .79 | |
| Education level, n (%)b | .049 | ||||
| Primary school/basic vocational school | 191 (29.0) | 10 (47.6) | 181 (28.4) | ||
| Secondary vocational school/high school degree | 209 (31.8) | 2 (9.5) | 207 (32.5) | ||
| Higher professional degree/university degree | 258 (39.2) | 9 (42.9) | 249 (39.1) | ||
| COPDd status, n (%)c | .06 | ||||
| Diagnosed with COPD | 146 (22.2) | 1 (4.8) | 145 (22.8) | ||
| Increased risk for COPD per RHSQe | 512 (77.8) | 20 (95.2) | 492 (77.2) | ||
| MRCf dyspnea (n=657)g, n (%) | .11 | ||||
| No breathlessness | 177 (26.9) | 8 (40.0) | 169 (26.5) | ||
| 1 | 264 (40.2) | 9 (45.0) | 255 (40.0) | ||
| 2 | 167 (25.4) | 1 (5.0) | 166 (26.1) | ||
| 3 | 34 (5.2) | 1 (5.0) | 33 (5.2) | ||
| 4 | 9 (1.4) | 1 (5.0) | 8 (1.3) | ||
| 5 | 6 (0.9) | 0 (0.0) | 6 (0.9) | ||
| Smoking status, n (%)b | .09 | ||||
| Currently smoking | 241 (36.6) | 4 (19.0) | 237 (37.2) | ||
| Currently not smoking | 417 (63.4) | 17 (81.0) | 400 (62.8) | ||
| Intention to quit smoking (1=highest intention, 7=lowest intention) among smokers (n=241), median (IQRh)i | 4.0 (2.0-5.5) | 1.0 (1.0-1.8) | 4.0 (2.0-6.0) | .01 | |
| Level of physical activity (METj per week) (n=555), median (IQR)i | 2904.0 (1200.0-5758.0) | 3036.0 (74.3-4518.8) | 2904.0 (1212.-5787.5) | .36 | |
| Intention to be more physically active (1=highest intention, 7=lowest intention), median (IQR)i | 3.0 (2.0-4.0) | 3.0 (1.0-4.5) | 3.0 (2.0-4.0) | .64 | |
aIndependent samples t test.
bChi-square test.
cFisher’s exact test.
dCOPD: chronic obstructive pulmonary disease.
eRHSQ: Respiratory Health Screening Questionnaire.
fMRC: Medical Research Council.
gFisher-Freeman-Halton test.
hIQR: interquartile range.
iMann Whitney U test.
jMET: metabolic equivalent task.