Different Training Durations and Frequencies of Tai Chi for Bone Mineral Density Improvement: A Systematic Review and Meta-Analysis

Table 5

Subgroup analyses between the Tai Chi and the nonexercise group for the outcome BMD change in Ward’s triangle according to intervention durations and frequencies.

Subgroup	n	SMD, 95% CI		Heterogeneity
Intervention duration
≤10 months	4	0.31, 95% [0.00, 0.61]	0.05	I^2 = 0%,  = 0.66
>10 months	6	0.38, 95% [0.03, 0.73]	0.03	I^2 = 60%,  = 0.03
Intervention frequencies
≤4 days/week	5	0.37, 95% [0.11, 0.64]	0.006	I^2 = 0%,  = 0.87
>days/week	5	0.35, 95% [−0.09, 0.79]	0.12	I^2 = 69%,  = 0.01