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Table 1 The detailed strategy and details of formula for search in databases

From: The effectiveness of supplemental oxygen during exercise training in patients with chronic obstructive pulmonary disease who show severe exercise-induced desaturation: a protocol for a meta-regression analysis and systematic review

(A). MEDLINE
1. Lung Diseases [MeSH Terms]
2. Lung Diseases, Obstructive [MeSH Terms]
3. Pulmonary Disease, Chronic Obstructive [MeSH Terms]
4. Bronchial Diseases [MeSH Terms]
5. Emphysema [MeSH Terms]
6. Hypoxia [MeSH Terms]
7. Hypoxemia [MeSH Terms]
8. COPD [All Fields]
9. COAD [All Fields]
10. COBD [All Fields]
11. exercise induced-desaturation [Title/Abstract])
12. #1OR #2 OR #3 OR #4 OR #5 OR #6 OR #7 OR #8 OR #9 OR #10
13. supplemental oxygen [Title/Abstract]
14. oxygen Inhalation Therapy [MeSH Terms]
15. oxygen supplementation [Title/Abstract]
16. oxygen supply [Title/Abstract]
17. Oxygen [MeSH Terms]
18. #13 OR #14 OR #15 OR #16 OR #17
19. exercise [MeSH Terms]
20. resistance Training [MeSH Terms]
21. exercise Therapy [MeSH Terms]
22. high-Intensity Interval Training [MeSH Terms]
23. physical Therapy Modalities [MeSH Terms]
24. physical Conditioning, Human [MeSH Terms]
25. rehabilitation [MeSH Terms]
26. #19 OR #20 OR #21 OR #22 OR #23 OR #24
27. randomized Controlled Trial [Title/Abstract]
28. trial [Title/Abstract]
29. randomized [Title/Abstract]
30. randomized [Title/Abstract]
31. randomly [Title/Abstract])
32. placebo [Title/Abstract]
33. #27 OR #28 OR #29 OR #30 OR #31 OR #32
34. Animals [Title/Abstract])
35. #33 NOT #34
36. #12 AND #18 AND #26 AND #35
(B). Embase
1. lung diseases
2. obstructive lung diseases
3. chronic obstructive pulmonary disease
4. bronchial diseases
5. emphysema
6. hypoxia
7. hypoxemia
8. COPD: ab
9. exercise induced-desaturation
10. #1 OR #2 OR #3 OR #4 OR #5 OR #6 OR #7 OR #8 OR #9
11. oxygen inhalation therapy
12. supplemental oxygen
13. oxygen supplementation
14. oxygen supply
15. #11 OR #12 OR #13 OR #14
16. exercise
17. resistance training
18. exercise therapy
19. interval training
20. physical therapy
21. rehabilitation
22. physical conditioning
23. exercise training
24. #16 OR #17 OR #18 OR #19 OR #20 OR #21 OR #22 OR #23
25. randomized controlled trial
26. trial. ab
27. randomized. ab
28. randomly. ab
29. placebo
30. #25 OR #26 OR #27 OR #28 OR #29
31. animals. ab
32. #30 NOT #31
33. #10 AND #15 AND #24 AND #32
(C). Cochrane Central Register of Controlled Trials
1. MeSH descriptor: [Lung Diseases] explode all trees
2. MeSH descriptor: [Lung Diseases, Obstructive] explode all trees
3. MeSH descriptor: [Pulmonary Disease, Chronic Obstructive] explode all trees
4. MeSH descriptor: [Bronchial Diseases] explode all trees
5. MeSH descriptor: [Emphysema] explode all trees
6.7MeSH descriptor: [Hypoxia] explode all trees
7. Hypoxemia
8. COPD: ti,ab,kw OR COAD: ti,ab,kw OR COBD: ti,ab,kw OR exercise induced-desaturation: ti,ab,kw
9. #1 OR #2 OR #3 OR #4 OR #5 OR #6 OR #7 OR #8
10. MeSH descriptor: [Oxygen Inhalation Therapy] explode all trees
11. supplemental oxygen
12. oxygen supplementation
13. oxygen supply
14. MeSH descriptor: [Oxygenators] explode all trees
15. #10 OR #11 OR #12 OR #13 OR #14
16. MeSH descriptor: [Exercise] explode all trees
17. MeSH descriptor: [Resistance Training] explode all trees
18. MeSH descriptor: [Exercise Therapy] explode all trees
19. MeSH descriptor: [High-Intensity Interval Training] explode all trees
20. MeSH descriptor: [Physical Therapy Modalities] explode all trees
21. MeSH descriptor: [Physical Conditioning, Human] explode all trees
22. Rehabilitation
23. #16 OR #17 OR #18 OR #19 OR #20 OR #21 OR #22
24. Randomized Controlled Trial: pt OR trial: ti,ab,kw OR randomized: ti,ab,kw OR placebo: ti,ab,kw OR randomly: ti,ab,kw
25. animals
26. #24 NOT #25
27. #9 AND #15 AND #23 AND#26