Is dynamometry able to infer the risk of muscle mass loss in patients with COPD?

Figures & data

Table 1 General characteristics of the sample and comparison between groups with high lean mass and low lean mass

Variables	Men (n=37)		t	P	Women (n=20)		t	P
	HLM (18)	LLM (19)			HLM (14)	LLM (6)
Age (years)	68.6±9.0	69.2±7.3	−0.212	0.833	62.7±9.5	66.7±10.4	−0.656	0.521
Height (cm)	169.0±3.5	168.0±6.0	0.455	0.652	154.5±8.6	154.3±5.1	0.032	0.975
Weight (kg)	80.9±7.9	68.6± 10.8	2.977	0.005	61.8±14.3	58.5±3.5	0.386	0.704
BMI (kg/m^2)	28.3±2.6	24.3±3.6	2.958	0.006	25.8±5.0	24.5±0.5	0.417	0.682
Appendicular lean body mass (kg/m^2)	8.4±0.6	7.0±0.4	7.552	0.000	6.3±0.6	5.2±0.1	2.832	0.011
Knee extension (N)	269.6±104.3	199.9±55.9	2.554	0.015	146.3±36.3	124.8±31.6	0.954	0.353
Knee flexion (N)	118.8±14.2	110.1 ±24.1	0.959	0.344	75.6±23.1	70.3±5.8	0.388	0.703
Shoulder flexion (N)	63.7±17.5	61.8±21.2	0.235	0.816	41.6±12.7	39.7± 18.2	0.221	0.828
Shoulder abduction (N)	60.8±20.0	56.1±18.0	0.639	0.527	36.7±11.7	35.7±10.2	0.138	0.892

Note: The data are expressed in mean and (±) standard deviation.

Abbreviations: BMI, body mass index; HLM, high lean mass; LLM, low lean mass; N, newton.

Table 2 Association between low lean mass and muscle strength and functional exercise capacity in COPD patients

Variables	Low lean mass
	n (%)	OR (CI 95%)	P
Knee extension
Higher	12 (21.4)	1.00	0.045
Lower	20 (35.7)	5.93 (1.04–33.74)
Knee flexion
Higher	14 (25)	1.00	0.298
Lower	18 (32.1)	2.20 (0.49–9.68)
Shoulder flexion
Higher	16 (28.6)	1.00	0.898
Lower	16 (28.6)	0.91 (0.20–4.02)
Shoulder abduction
Higher	15 (26.8)	1.00	0.848
Lower	17 (30.3)	0.86 (0.19–3.85)
Functional exercise capacity
Higher	14 (25)	1.00	0.112
Lower	18 (32.1)	0.82 (0.054–1.357)

Abbreviations: OR, odds ratio; CI, confidence interval.