Skip to main content
. Author manuscript; available in PMC: 2009 Feb 25.
Published in final edited form as: Arch Phys Med Rehabil. 2008 Aug;89(8):1499–1506. doi: 10.1016/j.apmr.2008.02.018

Table 2.

Multivariate Predictors of Lung Volumes

Covariate TLC β (95% CL) FRC β (95% CL) RV β (95% CL) ERV β (95% CL)

BMI (kg/m2) −38.7 (−59.2 to −18.2) −73.9 (−89.2 to −58.6) −40.4 (−54.0 to −26.7) −32.2 (−42.0 to −22.3)
Time since injury (y) −17.3 (−25.5 to −9.2) −17.5 (−24.3 to −10.7) −10.4 (−16.4 to −4.5) −7.9 (−12.3 to −3.5)
Stature (cm) 66.9 (53.1 to 80.7) 33.4 (23.4 to 43.5) 27.2 (18.4 to 36.0) NA
Age (y) NA 17.1 (10.9 to 23.4) 16.9 (11.0 to 22.8) −2.8 (−6.7 to 1.1)*
MIP (cmH2O) 4.0 (0.7 to 7.4) NA −3.2 (−5.5 to −0.9) NA
Pack-years NA 5.3 (2.1 to 8.5) 3.1 (0.3 to 6.0) NA
MD-diagnosed COPD NA NA 342.3 (56.6 to 628.0) NA

NOTE. All models are adjusted for level and severity of injury; variables without regression coefficients listed were not included in the final model for that lung volume; the units for β values are milliliters of lung volume divided by units of each specific variable; adjusted R2 values for the models were .39, .38, .36, and .27 for TLC, FRC, RV, and ERV, respectively.

Abbreviations: CL, confidence limits; NA, not applicable.

*

P=.16.