Table 5.
Subgroup analysis of change of skeletal muscle mass index before and after the start of the COVID-19 pandemic.
| Point 1 | Point 2 | Point 3 | *p Value | Change between Point 1 and Point 2 | Change between Point 2 and Point 3 | ** p Value | |
|---|---|---|---|---|---|---|---|
| Stress (−), n = 17 | 6.6 (0.8) | 6.6 (0.9) | 6.5 (0.9) | 0.042 | −0.013 (0.152) | −0.071 (0.155) | 0.399 |
| Stress (+), n = 5 | 6.7 (1.3) | 6.9 (1.2) | 6.8 (1.3) | 0.402 | 0.202 (0.153) | −0.060 (0.296) | 0.108 |
| Sleep duration decrease (−), n = 18 | 6.5 (0.8) | 6.6 (0.9) | 6.5 (0.9) | 0.302 | 0.032 (0.199) | −0.065 (0.217) | 0.242 |
| Sleep duration decrease (+), n = 4 | 7.0 (1.2) | 7.1 (1.3) † | 6.9 (1.3) | 0.072 | 0.084 (0.032) | −0.082 (0.073) | 0.005 |
| Exercise decrease (−), n = 11 | 6.5 (0.5) | 6.5 (0.5) | 6.4 (0.7) | 0.874 | 0.024 (0.205) | −0.027 (0.255) | 0.643 |
| Exercise decrease (+), n = 11 | 6.8 (1.2) | 6.9 (1.2) | 6.7(1.2) ‡ | 0.006 | 0.061 (0.154) | −0.107 (0.111) | 0.036 |
* p value was evaluated among three points by repeated measures ANOVA. To compare the differences among three points, Bonferroni correction was used. † p < 0.05, vs. point 1 and ‡ p < 0.05, vs. point 2. Change between point 1 and point 2 was defined as (data at point 1–data at point 2)/duration (year). Change between point 2 and point 3 was defined as (data at point 2−data at point 3)/duration (year). ** p value was evaluated the differences between change from point 1 to point 2 and change from point 2 to point 3 by paired t test.