Table 1.
Three‐year change in body composition and BMI variability quintile
| Quintile | ASV method | rASV method | |||
|---|---|---|---|---|---|
| β (95% CI) | P | β (95% CI) | P | ||
| ΔBMI Z score | 1 | 0 (reference) | — | 0 (reference) | — |
| 2 | 0.019 (−0.026, 0.054) | 0.41 | −0.011 (−0.055, 0.034) | 0.64 | |
| 3 | −0.009 (−0.054, 0.036) | 0.69 | −0.021 (−0.066, 0.024) | 0.35 | |
| 4 | −0.034 (−0.079, 0.011) | 0.14 | −0.008 (−0.053, 0.038) | 0.74 | |
| 5 | −0.086 (−0.133, −0.040) | <0.01 | −0.021 (−0.066, 0.024) | 0.35 | |
| ΔFMI Z score | 1 | 0 (reference) | — | 0 (reference) | — |
| 2 | 0.012 (−0.043, 0.066) | 0.68 | −0.017 (−0.070, 0.036) | 0.54 | |
| 3 | −0.002 (−0.057, 0.053) | 0.95 | −0.017 (−0.070, 0.037) | 0.54 | |
| 4 | 0.003 (−0.052, 0.058) | 0.91 | 0.023 (−0.031, 0.077) | 0.40 | |
| 5 | −0.059 (−0.117, −0.002) | 0.04 | −0.004 (−0.058, 0.050) | 0.89 | |
| ΔALMI Z score | 1 | 0 (reference) | — | 0 (reference) | — |
| 2 | 0.010 (−0.046, 0.065) | 0.74 | 0.003 (−0.053, 0.060) | 0.91 | |
| 3 | −0.006 (−0.046, 0.065) | 0.84 | −0.016 (−0.727, 0.042) | 0.46 | |
| 4 | −0.037 (−0.093, 0.019) | 0.20 | −0.004 (−0.061, 0.053) | 0.88 | |
| 5 | −0.044 (−0.102, 0.015) | 0.15 | 0.023 (−0.035, 0.080) | 0.44 | |
Note: Greater loss of BMI and FMI is observed among those with greater BMI variability by the ASV method, but not the rASV method. Abbreviations: ALMI, appendicular lean mass index; ASV, average successive variability; BMI, body mass index; CI, confidence interval; FMI, fat mass index; rASV, residual average successive variability.