Table 4
Overall similarity index of included articles (n=495)
Overall similarity index
No of articles (%)
0–10%
137 (28)
11–20%
202 (41)
21–30%
104 (21)
31–40%
34 (7)
41–50%
13 (3)
51–60%
2 (0.4)
61–70%
3 (0.6)
71–100%
0