Gurei M [22]

0.85 (0.73 – 0.99)

48.5

36.2

Özgóztaslis O [19]

1.33 (1.05 – 1.69)

19.5

30.0

Asilian A [21]

1.03 (0.85 – 1.23)

32.0

33.8

Overall Fixed effects

0.99 (0.89 – 1.10)
  
Overall Random effects

1.04 (0.81 – 1.32)
  
Sensitivity analysis Omitted study
 
Relative change

Gurei M [22] N = 133

1.16 (0.90 – 1.50)

11.45

Özgóztaslis O [19] N = 90

0.93 (0.77 – 1.11)

−10.62

Asilian A [21] N = 361

1.06 (0.68 – 1.64)

1.70

Heterogeneity
  
Dersimonian and Laird's, Q statistic (Chisquared)

10.06 pvalue = 0.006
 
RI Coefficient (Proportion of total variance due to the betweenstudy variance)

0.648
 
Variance between studies

0,036
 
Variance within studies

0,008
 
Variation coeff. between studies

15,961
 
No publication bias
  
Begg’s test, Z Statistic

1.044, p = 0.296
 