The Effectiveness of Traditional Chinese Medicine (TCM) as an Adjunct Treatment on Stable COPD Patients: A Systematic Review and Meta-Analysis

Table 1

Search terms used in PubMed.

Number	Search terms
1	Randomized controlled trial
2	RCT
3	Randomized
4	Randomly
5	Trial
6	Groups
7	Controlled clinical trial
8	1 or 2-7
9	Chronic obstructive pulmonary disease
10	COPD
11	Chronic obstructive airway disease
12	Chronic obstructive respiratory disease
13	Chronic bronchitis
14	Emphysema
15	Chronic airflow obstruction
16	9 or 10-15
17	Chinese Medicine
18	Chinese Herbal Medicine
19	CHM
20	Traditional Chinese Medicine
21	TCM
22	Traditional medicine
23	Herb
24	Herbmedicine
25	Plant medicine
26	Herb formula
27	Herb decoction
28	17 or 18-27
29	Acupuncture
30	Acupoint
31	Needling
32	Dry needling
33	29, 30–32
34	8 and 16 and 28 and 33