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Table 3 Correlation between deposition fractions and lung function

From: Altered deposition of inhaled nanoparticles in subjects with chronic obstructive pulmonary disease

   DF DF DF
   50 nm
1300 mL
50 nm
1800 mL
100 nm
1800 mL
FEV1%pred Pearson’s r 0.317* 0.391** 0.357**
p-value 0.028 0.0060 0.013
FEV1/VC%pred Pearson’s r 0.452** 0.530*** 0.574***
p-value 0.0013 0.00011 0.000020
DL,CO %pred Pearson’s r 0.494*** 0.571*** 0.518***
p-value 0.00049 0.000034 0.00023
  1. n = 46, DL,CO data for two subjects is missing
  2. *Significance < 0.05 level
  3. **Significance < 0.01 level
  4. ***Significance < 0.001 level
  5. Pearson’s correlation coefficients, r, and p-values for the associations between particle deposition and clinical lung function tests for all subjects (n = 48)