Table 4.

Predictors of MIP in Men (age adjusted)

	Coeff	95% CI		p-value
Age (yrs)	−1.44	−1.63	−1.26	<.0001
White	ref			ns
African-American	−3.6	−7.7	0.6
Chinese	−5.8	−11.3	−0.2
Hispanic	0.1	−4.13	4.4
Wake Forest	2.5	−4.0	9.0	<.0001
Columbia	4.3	−0.2	8.7
Johns Hopkins	−3.0	−6.3	0.2
Minnesota	8.0	3.8	12.1
Northwestern	1.9	−5.6	9.4
UCLA	Ref
Height (cm)	0.19	0.06	0.32	0.005
BMI < 18.5	−7.6	−15.5	0.4	<.0001
BMI 18.5 – 25	ref
BMI 25 – 30	9.3	5.9	12.7
BMI 30 – 35	8.0	3.4	12.6
BMI > 35	3.3	−2.1	8.8
FVC (liters)	8.1	6.09	10.0	<.0001
Health >norm	3.6	0.9	6.2	<.0001
health average	ref
health worse	−8.8	−16.1	−1.5

Abbreviations: Coeff = average difference in MIP per unit change in the variable CI = confidence interval, BMI = body mass index, ref = reference group; ns = not significant. These variables remained significant predictors in a multivariate model which included age, race, study site, height, BMI, FVC, and health status.