Table 4.

Meta-regression analysis for study duration (weeks), percentage of males in the population, age of the participants (mean), dose of the active product, and percentage of the analysed participants on appendicular muscle mass rate in persons receiving intervention.

Covariates	Appendicular Mass
	Q	df	Coefficient	SE	Z	p
Study duration (weeks)	0.02	1	−0.0022	0.0157	−0.14	0.8868
% male	0.02	1	0.0039	0.0255	0.15	0.8773
Age	0.10	1	0.0123	0.0396	0.31	0.7566
Dose	0.02	1	−0.0005	0.0034	−0.15	0.8769
% analysed	0.37	1	−0.0004	0.0006	−0.61	0.5443
	Handgrip strength
	Q	df	Coefficient	SE	Z	p
Study duration (weeks)	5.01	1	−0.0083	0.0037	−2.24	0.0252
% male	2.76	1	0.0407	0.0245	1.66	0.0968
Age	0.47	1	−0.0311	0.0455	−0.68	0.4934
Dose	0.84	1	−0.0051	0.0056	−0.92	0.3589
% analysed	3.14	1	−0.0018	0.0010	−1.77	0.0765
	Chair and stand test
Study duration (weeks)	29.12	1	−0.1522	0.0282	−5.40	0.0000
% male	2.72	1	−0.8611	0.5221	−1.65	0.0991
Age	29.20	1	0.2822	0.0522	5.40	0.0000
Dose	0.09	1	−0.0031	0.0104	−0.30	0.7625
% analysed	29.12	1	−0.0042	0.0008	−5.40	0.0000
	SPPB
Study duration (weeks)	0.21	1	−0.0012	0.0027	−0.45	0.6503
% male	0.00	1	−0.0010	0.0291	−0.03	0.9739
Age	0.04	1	0.0039	0.0187	0.21	0.8353
Dose	0.01	1	−0.0002	0.0025	−0.07	0.9415
% analysed	0.72	1	−0.0005	0.0006	−0.85	0.3971
	Weight
Study duration (weeks)	1.96	1	−0.0048	0.0034	−1.40	0.1615
% male	0.03	1	0.0027	0.0145	0.18	0.8537
Age	0.00	1	0.0015	0.0263	0.06	0.9557
Dose	0.10	1	−0.0029	0.0093	−0.31	0.7571
% analysed	0.41	1	−0.0008	0.0013	−0.64	0.5232