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The linear and quadratic LMM regression lines for women and men
Note: The linear model defined the yearly decline in CRF at −0.0545/year for women and for men, −0.0767/year. The LMM quadratic models are: women, CRF=8.2475 + (age × 0.1391) − (age2 × 0.0020); and men, CRF=11.0850 + (age × 0.1378) − (age2 × 0.0022).
