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. Author manuscript; available in PMC: 2009 Feb 26.
Published in final edited form as: Arch Phys Med Rehabil. 2009 Feb;90(2):193–200. doi: 10.1016/j.apmr.2008.07.026

Table 3.

Multivariable Models ζ of Cardiopulmonary Hospitalizations§

Model Cardiopulmonary HR (95%CI) (n=143) Circulatory System HR (95% CI) (n=77) Respiratory System HR (95% CI) (n=66)

A. Multivariate Model
Age 1.03 (1.01–1.05) 1.05 (1.03–1.07) 1.01 (1.00–1.03)
Hypertension 1.74 (1.12–2.75) 1.18 (0.73–1.90) 2.69 (1.47 –4.90)
FEV1-%predicted 0.97 (0.96–0.98) 0.99 (0.98–1.00) 0.96 (0.94–0.97)
Lowest BMI quintile 1.79 (1.19–2.68) 1.46 (0.83–2.54) 1.99 (1.13–3.51)

B. Each variable added:
Any Wheeze 1.02 (0.70–1.49) 1.01 (0.63–1.64) 1.13 (0.62–2.06)
Persistent Wheeze 1.08 (0.71–1.65) 0.86 (0.50–1.49) 1.32 (0.70–2.49)
Chronic Phlegm 1.48 (0.93–2.38) 1.07 (0.62–1.84) 1.88 (0.94–3.73)
Chronic Cough 1.54 (1.02–2.33) 1.23 (0.76–1.99) 1.91 (0.98–3.72)
Pneumonia 1.53 (0.99–2.38) 1.25 (0.69–2.28) 1.52 (0.89–2.61)

C. Each variable added in place of FEV1:
Any Wheeze 1.28 (0.85–1.93) 1.12 (0.69–1.83) 1.59 (0.83–3.04)
Persistent Wheeze 1.44 (0.91–2.30) 0.98 (0.57–1.67) 2.07 (1.10–3.91)
Chronic Phlegm 1.62 (0.99–2.66) 1.10 (0.64–1.90) 2.24 (1.15–4.37)
Chronic Cough 1.70 (1.09–2.65) 1.28 (0.78–2.10) 2.23 (1.14–4.36)
Pneumonia 1.89 (1.18–3.01) 1.31 (0.73–2.33) 2.47 (1.37–4.47)
ζ

Adjusted for any-cause readmission within ≤ 30 days

§

Bolded numbers represent statistical significance, i.e. p < 0.05