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Table 3 Results of univariable and multivariable Cox proportional hazards regression for 39 dogs

From: Body weight at 10 years of age and change in body composition between 8 and 10 years of age were related to survival in a longitudinal study of 39 Labrador retriever dogs

  Variable
BW at 10 years Change in lean mass 8 to 10 years Change in lean:fat 8 to 10 years Age at start of study
Univariate analysis
 β (SE) 0.104 (0.045) − 0.0004 (0.0002) − 0.82 (0.48) 0.23 (0.20)
 HR (SE) 1.11 (0.05) 0.9996 (0.0002) 0.44 (0.21) 1.25 (0.25)
 HR 95% CI 1.017–1.210 0.9991–1.0001 0.17–1.13 0.85− 1.84
 P-value 0.020 0.12 0.09 0.25
Multivariable analysis/adjusted model
 β (SE) 0.170 (0.059) − 0.0012 (0.0003) − 1.43 (0.45) 0.53 (0.20)
 HR (SE) 1.19 (0.07) 0.9988 (0.0003) 0.24 (0.11) 1.69 (0.34)
 HR 95% CI 1.06–1.33 0.9982, 0.9993 0.099–0.582 1.15–2.50
 P-value 0.004 < 0.001 0.002 0.008
  1. Body weight (BW), change in lean body mass and change in the ratio of lean to fat mass during middle age (~ 8 to 10 years of age) were all significant independent predictors of survival in the final regression model