Table 3.
Evidence collection and appraisal process (N = 265)
| Publication period | P | ||||||
|---|---|---|---|---|---|---|---|
| by 2005 | 2006–2010 | 2011–2015 | 2016–2019 | ||||
| (N = 40) | (N = 47) | (N = 77) | (N = 101) | ||||
| Database | |||||||
| Ichushi a | n (%) | 29 (87.9) | 35 (78.3) | 64 (83.1) | 84 (82.2) | 0.762 b | |
| JMEDplus a | n (%) | 9 (27.3) | 12 (26.1) | 10 (13.0) | 8 (7.9) | 0.001 b | |
| PubMed | n (%) | 37 (92.5) | 46 (100.0) | 74 (96.1) | 101 (99.0) | 0.123 b | |
| Cochrane | n (%) | 21 (52.5) | 25 (56.5) | 48 (62.3) | 61 (60.4) | 0.366 b | |
| Number of articles | |||||||
| Searched | mean (SD) | 7441.7 (13,052.7) | 3721.0 (6460.0) | 3924.4 (5427.8) | 5772.4 (10,802.2) | 0.826 c | |
| Appraised | mean (SD) | 603.5 (708.0) | 303.9 (304.4) | 638.6 (1050.0) | 550.7 (923.9) | 0.823 c | |
| Cited | mean (SD) | 305.6 (208.7) | 377.5 (349.9) | 493.6 (783.1) | 350.9 (329.4) | 0.806 c | |
| Yield rate of articles | |||||||
| Appraised/Searched | mean (SD) | 0.155 (0.219) | 0.267 (0.268) | 0.315 (0.356) | 0.241 (0.270) | 0.402 c | |
| Cited/Searched | mean (SD) | 0.165 (0.241) | 0.312 (0.285) | 0.346 (0.337) | 0.182 (0.201) | 0.841 c | |
| CPGs using two or more reviewers for | |||||||
| Searching | n (%) | 16 (60.0) | 15 (55.6) | 15 (45.5) | 48 (77.4) | 0.059 b | |
| Appraising | n (%) | 15 (78.9) | 16 (80.0) | 16 (61.5) | 45 (78.9) | 0.963 b | |
| Citing | n (%) | 13 (43.3) | 18 (54.5) | 24 (61.5) | 48 (78.7) | 0.001 b | |
a Ichushi and JMEDplus are databases for Japanese medical journal articles
b Mantel-Haenszel test for trend
c Jonckheere-Terpstra test
Abbreviations: CPG clinical practice guideline, SD standard deviation