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Table 6 Fit statistics from structural equation modelling for DLco.

From: Genetic and environmental influence on lung function impairment in Swedish twins

Men ACE

-2LL

df

AIC

   DLco: unadjusted

727,511

82

563,511

   DLco: adj. PY

708,851

81

546,851

   DLco: adj. PY, symptoms

703,134

80

543,134

Women ADE

-2LL

df

AIC

   DLco: unadjusted

1507,060

178

1151,060

   DLco: adj. PY

1491,184

177

1137,184

   DLco: adj. PY, symptoms

1490,454

176

1138,454

  1. PY= pack years