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Table 1 Study characteristics before (2001–2009) and after (2011–2018) introduction of the PRISMA Statement

From: Exploring reporting quality of systematic reviews and Meta-analyses on nursing interventions in patients with Alzheimer’s disease before and after PRISMA introduction

Characteristic Before PRISMA (n = 18) After PRISMA (n = 59) Overall (n = 77) χ2/ t P
Type of article     4.53 0.09
Systematic reviews only 16 (88.9) 38 (69.6) 54 (70.1)   
Meta-analyses only 1 (5.6) 4 (6.8) 5 (6.5)   
Systematic reviews including meta-analyses 1 (5.6) 17 (28.8) 18 (23.4)   
Origin region of first author     1.69 0.68
Asia 2 (11.1) 12 (20.3) 14 (18.2)   
Europe 10 (55.6) 33 (55.9) 43 (55.8)   
U.S.A/Canada 3 (16.7) 9 (15.3) 12 (15.6)   
Australia 3 (16.7) 5 (8.5) 8 (10.4)   
Number of authors     4.91 0.03
1~ 4 15 (83.3) 32 (54.2) 47 (61.0)   
> 4 3 (16.7) 27 (45.8) 30 (39.0)   
International collaborative authorship     0.05 0.82
No 16 (88.9) 49 (83.1) 65 (84.4)   
Yes 2 (11.1) 10 (16.9) 12 (15.6)   
Number of affiliations of first author     1.96 0.16
1~ 3 15 (83.3) 39 (66.1) 54 (70.1)   
> 3 3 (16.7) 20 (33.9) 23 (29.9)   
Affiliation of author     1.36 0.61
Hospital 2 (11.1) 5 (8.5) 7 (9.1)   
University 12 (66.7) 46 (78.0) 58 (75.3)   
Institute 4 (22.2) 8 (13.6) 12 (15.6)   
journal type of published article     1.26 0.26
Nursing Journal 11 (61.1) 46 (78.0) 57 (74.0)   
Non Nursing Journal 7 (38.9) 13 (22.0) 20 (26.0)   
Number of included studies     0.05 0.83
< 10 5 (27.8) 18 (30.5) 23 (29.9)   
≥10 13 (72.2) 41 (69.5) 54 (70.1)   
RCT identified     10.44 0.01
Non-RCT 12 (66.7) 34 (57.6) 46 (59.7)   
Only RCT 1 (5.6) 21 (35.6) 22 (28.6)   
Unclear 5 (27.8) 4 (6.8) 9 (11.7)   
Followed PRISMA guideline     10.00 <  0.01
No 18 (100.0) 36 (61.0) 54 (70.1)   
Yes 0 (0.0) 23 (39.0) 23 (29.9)   
Protocol or Registration     0.73 0.39
No 15 (83.3) 41 (69.5) 56 (72.7)   
Yes 3 (16.7) 18 (30.5) 21 (27.3)   
Journal source of SCI     0.13 0.72
No 2 (11.1) 3 (5.1) 5 (6.5)   
Yes 16 (88.9) 56 (94.9) 72 (93.5)   
Manuscript length (no. of pages)     0.53 0.47
1~ 13 8 (44.4) 32 (54.2) 40 (51.9)   
> 13 10 (55.6) 27 (45.8) 37 (48.1)   
Funding support     0.07 0.79
No 11 (61.1) 34 (57.6) 45 (58.4)   
Yes 7 (38.9) 25 (42.4) 32 (41.6)   
The total score (\( \overline{x} \)± s) 17.11 ± 4.59 20.83 ± 3.78 19.96 ± 4.26 −3.47 <  0.01
  1. Asia (China, Hong kong, Taiwan, Jepan, Korea, Singapore); Europe (Britain, Netherlands, Germany, Sweden, Spain, Norway, Finland, Belgium, Ireland)
  2. Significant results are shown in bold