Table 6.
Association of RMR and CPK With FI34 in “Old” Men and Women
| Variable | “Old” Male Group (90–97 y) | “Old” Female Group (90–98 y) | ||
|---|---|---|---|---|
| b | p Value | b | p Value | |
| Age | 5.05 × 10− 3 | .44 | −3.67 × 10− 3 | .48 |
| FM | 2.86 × 10− 3 | .28 | 5.00 × 10− 3 | 7.2 × 10− 3 |
| FFM | −3.06 × 10− 3 | .35 | −9.28 × 10− 3 | .012 |
| TDEE | −4.20 × 10− 6 | .91 | −1.94 × 10− 5 | .66 |
| RMR | 2.05 × 10− 4 | .040 | 3.84 × 10− 4 | 3.4 × 10− 3 |
| CPK | 4.50 × 10− 4 | 1.2 × 10− 3 | −6.31 × 10− 5 | .82 |
| IGF1 | −1.22 × 10− 5 | .95 | −5.66 × 10− 5 | .74 |
| T3 | −1.69 × 10− 4 | .60 | −2.29 × 10− 4 | .53 |
| T4 | −6.20 × 10− 5 | 1.0 | 1.01 × 10− 2 | .18 |
Notes: CPK = creatine phosphokinase; FM = fat mass; FFM = fat-free mass; IGF1 = insulin-like growth factor 1; RMR = resting metabolic rate; TDEE = total daily energy expenditure; T3 = triiodothyronine; T4 = thyroxine. For the model FI34 = b 0 + b 1·age + b 2·FM + b 3·FFM + b 4·TDEE+ b 5·RMR+ b 6·CPK + b 7·IGF1 + b 8·T3 + b 9·T4, adjusted R 2 = .325 (p = .015) for the female group and .338 (p = .033) for the male group. b is the regression coefficient, and the sample size is 30 for “old” men and 37 for “old” women.