Table 3. Group mean values of percentage of membrane proteinase 3-positive PMN (Mean % PR3+) and mean channel fluoresence intensity (MFI) of membrane proteinase 3 (Mean MFI m PR3) on PMN for monozygotic and dizygotic twinsa

ParameterTwins
MonozygoticDizygotic
aValues are mean ± SEM. No significant difference between MZ and DZ twins was seen. The heritability was a maximum likelihood estimate of heritabily.
Mean % mPR3+55 ± 455 ± 4
Correlation % mPR3+0.9970.058
Heritability % mPR3+99.7 (66.9 to 99.8)
Mean MFI mPR3341 ± 49358 ± 49
Correlation MFI mPR30.9610.001
Heritability MFI mPR396.7 (68.3 to 98.6)