Table 7 Comparison of the percentage of studies complying with PRISMA-A items according to the type of review and the number of authors. Mann-Whitney U test *p < 0.05; **p < 0.01; ***p < 0.001

ITEM

Mean

95% CI

Mean

95% CI

p

Mean

95% CI

Mean

95% CI

p

Title

91.86

87.14–96.58

94.53

91.02–98.02

0.655

90.43

85.76–95.08

96.4

93.18–99.61

0.028*

Objectives

84.5

79.77–89.21

85.4

80.91–89.88

0.771

82.62

77.85–87.39

87.6

83.29–91.90

0.153

Eligibility criteria

64.73

57.55–71.90

62.41

55.25–69.56

0.68

60.28

53.35–67.21

67.2

59.81–74.58

0.14

Information sources

58.53

51.29–65.75

65.69

58.76–72.62

0.139

64.18

57.41–70.95

60

52.54–67.45

0.428

Risk of bias

21.71

14.83–28.57

10.95

6.28–15.61

0.030*

12.41

7.22–17.59

20.4

13.83–26.96

0.035*

Included studies

73.26

67.69–78.81

65.81

60.47–71.14

0.038*

63.21

57.85–68.57

76.4

71.05–81.74

0.001**

Synthesis of results

84.5

79.65–89.34

69.71

63.61–75.79

< 0.001***

73.76

67.99–79.52

80.4

74.90–85.89

0.106

Description of the effect

85.27

80.23–90.30

69.34

63.09–75.59

< 0.001***

75.53

69.76–81.30

78.8

72.82–84.77

0.375

Strengths and limitations of the evidence

27.91

20.77–35.03

36.86

29.74–43.97

0.054

31.91

25.00–38.82

33.2

25.74–40.65

0.81

Interpretation

93.02

89.13–96.91

93.07

89.96–96.17

0.506

92.55

89.11–95.99

93.6

90.04–97.15

0.564

Funding and conflict of interest

0

–

0

–

1

0

–

0

–

1

Registration

0.78

0.00–2.30

0

–

0.303

0

–

0.8

0.00–2.38

0.288

Total PRISMA-A score

57.11

55.26–58.95

54.41

52.69–56.12

0.026*

53.77

52.06–55.48

57.89

56.08–59.69

< 0.001***