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Table 2 Demographic data of the COPD patients included the study

From: Altered protease and antiprotease balance during a COPD exacerbation contributes to mucus obstruction

subject age Pack years smoking status   chest x-ray (infiltrations?) CRP in mg/l leucocytes in G/l (normal: 4.3–10) Procalcitonin in μg/l FEV1 (%) VC (%) FEV1/VC (%) color of sputum
01 51 80 current smoker Visit 1 no <5 6.24 * 49 95 47 clear
     Visit 2   <5 7.05 * 58 94 55 clear
02 61 80 former smoker Visit 1 no <5 8.28 0.22 63 95 66 clear/slightly yellow
     Visit 2   14 8.14 0.17 67 95 70 clear
03 74 20 former smoker Visit 1 unkown 31 7.25 * 67 95 70 clear
     Visit 2   18 6.64 * 81 95 75 clear
04 67 20 former smoker Visit 1 no 11 10.7 <0.1 48 89 53 clear/slightly yellow
     Visit 2   * * * 42 98 43 clear
05 65 30 former smoker Visit 1 no 18 3.92 <0.1 68 98 69 clear
     Visit 2   <5 5.21 <0.1 95 98 97 clear
06 52 50 current smoker Visit 1 no 11 13 * 32 93 34 clear
     Visit 2   <5 9.15 * 74 98 75 clear
07 57 35 current smoker Visit 1 no <5 5.89 * 37 91 41 clear
     Visit 2   * * * 58 90 64 clear
08 50 50 current smoker Visit 1 no 14 15.3 <0.1 36 93 39 clear
     Visit 2   24 15.3 <0.1 51 92 55 clear
09 62 70 current smoker Visit 1 no 7 8.5 * 56 89 63 clear/slightly yellow
     Visit 2   <5 6.15 * 67 89 75 clear
  1. *Data not collected