The frequency of ex-smokers was higher in the latter strata (12 ex-smokers and 10 current smokers for very severe COPD and 8 ex-smokers and 13 current smokers for severe COPD) but did not reach statistical significance (χ 2 test, p = 0.279).
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Serum YKL-40 Levels, Leukocyte Profiles, and Acute Exacerbations of Advanced COPD.
2
0.2790
0.2790
The sentences
The measured values for NLR ( Figure 1 d; Mann–Whitney U test, p = 0.028) showed a trend similar to that seen for the neutrophil percentage.