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Table 1 Descriptive statistics at baseline and follow-up for spirometry, 6MWT, and SGRQ results

From: An initial evaluation of the safety of a disposable oscillating positive expiratory pressure device in patients with chronic obstructive pulmonary disease: a short-term pilot study

  Spirometry 6MWT SGRQ
FEV1 (L) FVC (L) FEV1/FVC Distance (m) Mean SpO2 (%) Symptoms Activity Impact Total
Baseline          
(n) 24 24 24 18 18 20 20 20 20
Mean 1.410 2.744 0.514 404.72 93.05 60.63 56.14 27.96 42.07
95% CI Lower 1.129 2.383 0.442 345.32 91.54 53.03 43.9 21.46 34.76
95% CI Upper 1.692 3.105 0.587 464.11 94.56 68.23 68.38 34.45 49.37
Median 1.275 2.750 0.508 422.00 92.50 60.92 52.84 28.86 40.01
Standard Dev 0.666 0.855 0.173 119.43 3.03 16.23 26.14 13.87 15.6
Min 0.550 1.180 0.230 180.00 85.00 21.65 7.64 6.04 16.08
Max 2.760 4.390 0.840 575.00 99.00 90.73 100 55.67 70.63
Skewness 0.642 0.180 0.019 − 0.439 − 0.526 − 0.293 0.098 0.279 0.078
Kurtosis − 0.646 − 0.570 − 0.915 − 0.786 2.217 0.73 − 0.931 − 0.505 − 0.934
Follow up          
(n) 24 24 24 18 18 19* 20 20 20
Mean 1.460 2.764 0.521 431.28 92.84 60.99 58.74 31.82 42.8
95% CI lower 1.147 2.400 0.446 372.14 91.39 51.45 48.89 23.66 36.71
95% CI upper 1.774 3.128 0.597 490.40 94.29 70.52 68.58 39.99 48.89
Median 1.280 2.700 0.547 435.00 93.17 5915 60.335 30.94 39.6
Standard Dev 0.742 0.861 0.179 118.90 2.91 19.78 21.03 17.44 13.01
Min 0.560 1.170 0.220 270.00 86.00 32.26 22.2 4.76 14.04
Max 3.290 4.840 0.880 655.00 97.00 97.05 92.45 79.14 65.12
Skewness 0.851 0.415 0.600 0.276 − 1.038 0.096 − 0.344 0.911 0.018
Kurtosis 0.206 0.154 − 0.784 − 1.003 0.994 − 0.975 − 0.924 1.69 − 0.131
  1. *The Symptom score for participant ID66 was not exported by the SGRQ app