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Table 1 Characterization of the sample and the quadrants

From: The “can do, do do” concept in individuals with chronic obstructive pulmonary disease: an exploration of psychological mechanisms

  Whole Sample Quadrant 1 (“can’t do, don’t do”) Quadrant 2 (“can do, don’t do”) Quadrant 3 (“can’t do, do do”) Quadrant 4 (“can do, do do”) Comparison between subgroups Significant compa-risons or direction
N 298 69 61 37 131
Age [in years] 58.13 ± 5.48 60.01 ± 7.00 58.87 ± 5.38 56.68 ± 5.55 57.21 ± 4.18 F (3, 294) = 5.41,
p = 0.001, η2 = 0.05
Q1, Q2 > Q3, Q4
Gender Distribution 30.5% female, 69.5% male 43.5% female, 56.5% male 23.0% female, 77.0% male 37.8% female, 62.2% male 25.2% female,
74.8% male
χ2 (3) = 9.80,
p = 0.02
Men were more strongly represented in Q2 and Q4
Body mass index (BMI) [kg/m2] 27.44 ± 6.57 26.66 ± 7.17 29.43 ± 6.97 26.52 ± 6.82 27.19 ± 5.81 F (3, 294) = 2.53,
p = 0.057, η2 = 0.03
none
GOLD Stages [1/2/3/4] 27/130/114/24 1/14/37/16 4/28/27/2 1/16/14/5 21/27/36/1 χ2 (9) = 66.3,
p < 0.001
Higher stages in Q1, lower stages in Q4
GOLD Classification [A/B/C/D]a 4/126/0/148 0/26/0/40 1/25/0/29 0/26/0/40 3/63/0/57 χ2 (3) = 4.77,
p = 0.19
None
Lung Function (FEV1 pred) 53.48 ± 18.25 39.62 ± 13.25 53.37 ± 16.21 49.58 ± 17.59 61.87 ± 16.91 F (3, 291) = 29.3,
p < 0.001, η2 = 0.23
Q1 < Q2, Q3 < Q4
COPD Assessment Test (CAT) 23.29 ± 6.67 26.36 ± 6.41 23.85 ± 6.47 24.58 ± 6.04 21.05 ± 6.34 F (3, 284) = 11.1,
p < 0.001, η2 = 0.11
Q1, Q2, Q3 > Q4
Quality of Life (SGRQ) 52.66 ± 10.40 46.35 ± 9.94 51.97 ± 9.84 52.85 ± 10.63 56.36 ± 9.17 F (3, 277) = 15.1,
p < 0.001, η2 = 0.14
Q1 < Q2, Q3 < Q4
Smoking Status 46.2% current smokers, 53.8% no/ former smokers 46.8% current smokers, 53.2% no/ former smokers 57.6% current smokers, 42.4% no/ former smokers 48.6% current smokers, 51.4% no/ former smokers 39.7% current smokers, 60.3% no/ former smokers χ2 (3) = 5.26,
p = 0.15
None
Employment Status 60.8% full-time, 15.8% half-time, 9.5% pension, 15.8% not employed 49.2% full-time, 13.1% half-time, 23.0% pension, 13.1% not employed 47.3% full-time, 10.9% half-time, 12.7% pension, 10.9% not employed 51.5% full-time, 24.2% half-time, 3.0% pension, 24.2% not employed 75.0% full-time, 16.9% half-time, 3.2% pension, 16.9% not employed χ2 (9) = 46.8,
p < 0.001
Unemployment was overrepresented in Q2, full-time employment in Q1, and pension in Q1
Number of
Comorbidities
4.66 ± 2.50 4.17 ± 2.77 4.67 ± 2.33 4.81 ± 2.64 4.88 ± 2.38 F (3, 294) = 1.25,
p = 0.293
None
Average Number of Steps per Day 5850 ± 3043 2991 ± 1104 3510 ± 945 6799 ± 1839 8323 ± 2370 F (3, 294) = 171.7, p < 0.001, η2 = .64 Q1 < Q3 < Q4,
Q2 < Q3 < Q4
6-minute Walking Test [m] 449.8 ± 102.3 326.8 ± 83.0 481.1 ± 59.9 392.5 ± 59.5 516.3 ± 61.5 F (3, 294) = 135.6, p < 0.001, η2 = 0.58 Q1 < Q3 < Q2 < Q4
  1. aFor the inference statistical group comparison, we removed the cases of the GOLD Classifications A and C due to the low number of individuals in these categories (for the χ2 test)
  2. Q1, quadrant 1; Q2, quadrant 2; Q3, quadrant 3; Q4, quadrant 4