From: Plasma YKL-40 and all-cause mortality in patients with chronic obstructive pulmonary disease
 | Hazard rate | 95% Confidence interval | p-value |
---|---|---|---|
High vs. normal plasma YKL-40** | 1.42 | 1.15 – 1.75 | 0.001 |
Age* | 1.04 | 1.03 – 1.06 | <0.001 |
Neutrophils†| 1.05 | 1.01 – 1.09 | 0.006 |
Charlson score index > 2 | 1.21 | 0.94 – 1.54 | 0.14 |
Moderate COPD‡ | Ref. value | Ref. value | - |
Severe COPD‡ | 1.38 | 1.06 – 1.77 | 0.014 |
Very severe COPD‡ | 1.94 | 1.45 – 2.60 | <0.001 |
Smoking at baseline | 1.10 | 0.90 – 1.35 | 0.36 |
BMI < 20 | 1.17 | 0.91 – 1.50 | 0.21 |
Pack years > 40 | 1.29 | 1.05 – 1.58 | 0.014 |