Table 2.

—Prediction Equations for Lobar Volume at Full Inflation by Race: Derivation Cohort and Validation Cohort

Lobe	Prediction Equation	Model R2
LLL
NHW (n = 755)	= −1897.26 + 18.82(ht) + 208.18(male)	0.68
AA (n = 260)	= −1752.02 + 16.43(ht) + 226.84(male)	0.64
LUL
NHW (n = 755)	= −1459.08 + 15.90(ht) + 297.56(male)	0.74
AA (n = 260)	= −1496.77 + 15.53(ht) + 253.84(male)	0.76
RLL
NHW (n = 755)	= −1667.14 + 18.20(ht) + 189.14(male)	0.64
AA (n = 260)	= −1581.19 + 16.07(ht) + 180.09(male)	0.59
RML
NHW (n = 755)	= −827.34 + 7.60(ht) + 87.95(male)	0.55
AA (n = 260)	= −679.79 + 6.30(ht) + 95.56(male)	0.52
RUL
NHW (n = 755)	= −858.36 + 11.06(ht) + 248.28(male)	0.65
AA (n = 260)	= −700.25 + 9.74(ht) + 203.98(male)	0.56

ht = height in cm; LLL = left lower lobe; LUL = left upper lobe; male = 1 for male and 0 for female; RLL = right lower lobe; RML = right middle lobe; RUL = right upper lobe. See Table 1 legend for expansion of other abbreviations.