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Table 3 Comparison of SP-D levels and cell viability among the study groups

From: Value of serum and induced sputum surfactant protein-D in chronic obstructive pulmonary disease

  Group 1 (control subjects) Group 2 (stage 1 and 2 COPD patients) Group 3 (stage 3 and 4 COPD patients) p
  (n = 20) (n = 20) (n = 20)  
Serum SP-D (ng/ml) 86.2 ± 49 108.9 ± 65 129 ± 71 p = 0.10
Sputum SP-D (ng/ml) 33.1 ± 34 28 ± 15.2 30.42 ± 12.8 p = 0.83
Viability % 73.5 ± 12.1 79.8 ± 11.2 80.1 ± 19 p = 0.86
  1. The results were expressed as mean ± standard deviation.
  2. COPD Chronic obstructive pulmonary disease, SP-D surfactant protein D.