Table 4 Results of simple regression analyses between right diaphragm parameters and muscle parameters.

From: Association between diaphragm excursion and whole-body muscle mass in older adults: an observational study

Explanatory variable

Outcome variable

ASM

TMM

SMM

SMI

Coef

[95% CI]

p-value

Coef

[95% CI]

p-value

Coef

[95% CI]

p-value

Coef

[95% CI]

p-value

Thickness (FRC) [mm]a

0.81

[–0.43, 2.06]

0.199

1.10

[–0.01, 2.21]

0.052

1.08

[–0.33, 2.49]

0.132

0.23

[–0.77, 0.54]

0.139

Thickening fraction [%]b

0.01

[0.00, 0.03]

0.157

0.01

[–0.01, 0.02]

0.281

0.01

[–0.01, 0.03]

0.210

0.00

[0.00, 0.01]

0.557

Diaphragm excursion [mm]c

0.12

[0.07, 0.16]

< 0.001*

0.11

[0.07, 0.15]

< 0.001*

0.13

[0.08, 0.18]

< 0.001*

0.03

[0.02, 0.04]

< 0.001*

  1. CI, confidence interval; coef, coefficient; ASM, appendicular skeletal muscle mass; TMM, trunk muscle mass; SMM, skeletal muscle mass; SMI, skeletal muscle index; FRC, functional residual capacity.
  2. an = 110, bn = 108, cn = 103. *p < 0.05.
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