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Table 2 Comparison of subgroups stratified according to diabetes and gender

From: Transfer factor for carbon monoxide in patients with COPD and diabetes: results from the German COSYCONET cohort

Parameter Male patients(all) Male/non-diabetes Male/diabetes extended def. Female patients(all) Female/non-diabetes Female/diabetes extended def.
Age (y) 65.8 ± 8.5 65.5 ± 8.6 67.1 ± 7.6° 63.8 ± 8.7* 63.5 ± 8.7* 66.6 ± 7.4°
BMI (kg/m2) 27.4 ± 4.9 26.9 ± 4.6 30.1 ± 5.5° 26.2 ± 5.8* 25.7 ± 5.5* 31.6 ± 6.5*°
Waist circumf. (cm) 104.6 ± 13.6 103.2 ± 13.0 111.4 ± 14.2° 91.6 ± 15.2* 90.2 ± 14. 4* 105.8 ± 15.4*°
Packyears 54.0 ± 38.8 52.1 ± 38.0 57.2 ± 42.4 40.2 ± 28.7* 39.8 ± 28.6* 48.8 ± 34.7°
Hb (mg/dl) 15.02 ± 1.38 15.09 ± 1.38 14.66 ± 1.33° 14.06 ± 1.16* 14.09 ± 1.13* 13.79 ± 1.36*°
HbA1c (%) 5.98 ± 0.76 5.78 ± 0.48 6.94 ± 1.09° 5.82 ± 0.64* 5.72 ± 0.45* 6.85 ± 1.15°
Creatinine (mg/dl) 0.97 ± 0.24 0.96 ± 0.23 1.00 ± 0.30° 0.78 ± 0.23* 0.77 ± 0.23* 0.84 ± 0.21*°
FEV1%pred 58.0 ± 21.7 58.0 ± 21.9 58.1 ± 20.3 62.2 ± 22.3* 61.9 ± 22.3* 64.6 ± 22.5*
FEV1/FVC 54.5 ± 13.5 54.5 ± 13.5 54.8 ± 13.2 55.1 ± 13.7 55.0 ± 13.7 56.9 ± 13.2
FVC%pred 79.0 ± 18.8 79.0 ± 18.9 79.4 ± 18.7 78.0 ± 19.4 78.0 ± 19.3 78.3 ± 20.3
TLC%pred 100.0 ± 24.2 100.0 ± 24.4 100.0 ± 23.4 129.9 ± 29.1* 130.1 ± 29.1* 127.6 ± 28.6*
RV%pred 149.5 ± 48.1 150.7 ± 48.8 142.2 ± 42.0° 144.4 ± 52.9 149.5 ± 45.0 144.0 ± 47.9
ITGV%pred 141.4 ± 36.2 142.9 ± 36.2 134.0 ± 34.9° 150.3 ± 37.4* 151.5 ± 36.6* 138.0 ± 40.2°
TLCO%pred 55.2 ± 21.0 54.6 ± 21.4 58.0 ± 19.0° 50.6 ± 20.4* 50.3 ± 20.2* 54.6 ± 21.1°
KCO%pred 70.6 ± 24.3 69.4 ± 24.5 77.1 ± 22.7° 62.5 ± 22.6* 61.6 ± 22.2* 71.1 ± 25.0*°
GOLD 0/1/2/3/4 166/159/597/484/126 126/137/494/403/110 40/22/103/81/16 171/116/404/298/54* 143/105/374/276/49* 28/11/30/22/5*°
  1. The table shows mean values and standard deviations or absolute numbers. Column 2 and 5 show the results of comparisons between females and males irrespective of diabetes, significant (p < 0.05) differences are marked with (*). Column 3 and 6 show the results of comparisons between females and males without diabetes, significant differences are marked with (*). Column 4 and 7 show the results of comparisons between male and female diabetes patients, significant differences are marked with (*). Column 3 and 4 shows the results of the comparison between male non-diabetes and male diabetes patients, significant (p < 0.05) differences are marked with (°). Column 6 and 7 show the comparison between female non-diabetes and female diabetes patients, significant differences are marked with (°). The comparisons between groups were performed by unpaired t-tests, either for equal or unequal variances depending on the data, or by chi-square-tests in the case of categorical variables