Acupuncture Therapy for Functional Effects and Quality of Life in COPD Patients: A Systematic Review and Meta-Analysis

Table 3

Univariate metaregression analysis of covariates of interest.

Covariates of interest	Coefficient	Standard error (SE)			95% confidence intervals (CI)
					Lower limit	Upper limit
Six-minute walk distance
Publication year	2.812	4.479	0.63	0.553	−8.148	13.773
Region
Intervention forms	26.947	21.520	1.25	0.257	−25.710	79.603
Sample size	−0.236	0.716	−0.33	0.753	−1.988	1.516
Treatment period	−0.115	0.292	−0.39	0.707	−0.829	0.599
SGRQ
Publication year	−1.634	2.107	−0.78	0.495	−8.340	5.072
Region	8.595	9.520	0.90	0.433	−21.702	38.891
Intervention forms	4.605	4.389	1.05	0.371	−9.363	18.573
Sample size	−0.382	0.225	−1.70	0.188	−1.097	0.334
Treatment period	−0.342	0.139	−2.47	0.090	−0.783	0.099
FEV1
Publication year	−0.028	0.043	−0.65	0.544	−0.139	0.083
Region
Intervention forms	−0.086	0.088	−0.98	0.371	−0.313	0.140
Sample size	0.003	0.003	0.83	0.447	−0.005	0.011
Treatment period	0.002	0.005	0.48	0.654	−0.011	0.016
Effective rate
Publication year	−0.064	0.060	−1.07	0.315	−0.203	0.074
Region
Intervention forms	−0.117	0.301	−0.39	0.707	−0.812	0.577
Sample size	−0.002	0.008	−0.22	0.830	−0.021	0.017
Treatment period	0.015	0.010	1.54	0.163	−0.008	0.037

Note. 6MWD: six-minute walk test/distance, SGRQ: St. George’s Respiratory Questionnaire. region was the same.