Table 3.

—Prediction Equations for Lobar Volume at End of Normal Exhalation by Race: Derivation Cohort and Validation Cohort

Lobe	Prediction Equation	Model R2
LLL
NHW (n = 669)	= −842.05 + 8.27(ht) + 45.32(male)	0.47
AA (n = 210)	= −1020.98 + 8.84(ht) + 70.96(male)	0.38
LUL
NHW (n = 669)	= −781.80 + 8.44(ht) + 140.30(male)	0.47
AA (n = 210)	= −1049.09 + 9.87(ht) + 156.25(male)	0.40
RLL
NHW (n = 669)	= −654.55 + 7.53(ht) + 38.26(male)	0.40
AA (n = 210)	= −1024.50 + 9.26(ht) + 41.34(male)	0.31
RML
NHW (n = 669)	= −419.26 + 4.06(ht) + 56.74(male)	0.41
AA (n = 210)	= −445.56 + 4.05(ht) + 72.68(male)	0.46
RUL
NHW (n = 669)	= −434.68 + 5.80(ht) + 109.55(male)	0.41
AA (n = 210)	= −331.72 + 5.05(ht) + 126.25(male)	0.29

See Table 1 and 2 legends for expansion of abbreviations.

* Fifty-one of 755 NHWs and 39 of 260 AAs did not have lobar volume measurements at the end of normal exhalation; 35 of 755 NHWs and 11 of 260 AAs were excluded because of total lung volume at functional residual capacity to total lung volume at TLC ratios that were outside the middle 95% of the distribution.