Table 2 Criteria for methodological quality assessment of reviewed studies and the frequency distributions of each criterion

Theoretical Framework

The study had no theory = 0 points

11

32.3

The study was based on a specific theory = 2 points

67.7

Design

Study Design

Cross-sectional = 1 point

28

82.4

Retrospective = 2 points

0

0

Prospective = 3 points

1

2.9

Qualitative = 3 point

14.7

Sample and measures

Sample size

Small sample (< 100) = 1 point

8

23.5

Medium sample (> 100 and < 300) = 2 points

4

11.8

Large sample (> 300) = 3 points

22

64.7

Measuring Instrument

Not reported = 0 point

0

0

Authors developed the instrument measuring factors = 1 point

15

44.1

Authors adopted a previously established instrument = 2 points

19

55.9

Analytical approaches

Data analysis

Univariate statistics/descriptive = 1 point

2

5.9

Bivariate statistics/ANOVA = 2 points

1

2.9

Multiple/logistic regression/ANCOVA = 3 points

24

70.6

Qualitative analysis (content & thematic analysis) = 3points

5

14.7

Multivariate statistics (structural equation modeling) = 4 points

2

5.9

Reliability

Not reported = 0 points

19

55.9

Reported = 1 point

15

44.1

Validity

Not reported = 0 points

19

55.9

Reported = 1 point

15

44.1

Results

Factors Associated with BC Screening

No factors were identified = 0 points

Uncontrolled analysis (factors were not tested for statistical significance) = 1 point

5

14.7

Controlled analysis (factors were tested for statistical significance) = 2 points

29

85.3

Conclusions

Not appropriate = 0 points

Appropriate = 1 point

34

100