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Table 1 Characteristics of the study population

From: Heterogeneous pattern of differences in respiratory parameters between elderly with either good or poor FEV1

Parameter UED group LED group Mean difference (UED-LED) 95% CI of difference p-value for difference
Mean ± SD Median (25%; 75%) Mean ± SD Median (25%; 75%) Lower Upper
Number 72 51 na na na na
Sex, m/f 28 / 44 27 / 24 na na na 0.123a
Age, years 76.8 ± 6.4 76.5 (71.3; 81.9) 77.8 ± 7.2 77.6 (70.6; 83.9) −1.0 −3.5 1,5 0.425
Height, m 1.63 ± 0.09 1.63 (1.56; 1.70) 1.64 ± 0.09 1.64 (1.57; 1.71) −0.00 − 0.04 0.03 0.793
Weight, kg 73.1 ± 10.2 72.9 (65.3; 81.0) 79.6 ± 13.3 78.9 (69.3; 88.6) −6.4 −10.8 −2.0 0.005
BMI, kg/m2 27.5 ± 3.9 27.2 (25.1; 29.5) 29.7 ± 4.4 28.6 (26.9; 32.2) −2.2 −3.7 −0.6 0.006
Former smokers, n (percentage) 21 (29.2%) 26 (51.0%) na na na 0.014 a
Pack years in former smokers, years 14.6 ± 17.0 9.4 (1.5; 21.0) 20.5 ± 20.8 12.2 (1.5; 36.6) −5.9 −17.4 5.7 0.592b
Diseases, n (percentage)
 Cardiovascular diseases 54 (75.0%) 44 (86.3%) na na na 0.126a
 Diabetes 8 (11.3%) 8 (15.7%) na na na 0.476a
 Neurological diseases 0 (0.0%) 4 (7.8%) na na na na
 Arthritis 5 (6.9%) 8 (15.7%) na na na 0.120a
  1. aChi-Square test, bMann-Whitney U test
  2. p-values below 0.05 are shown in bold