Counselling about the Risk of Preterm Delivery: A Systematic Review
Table 2
Quality assessment of the included studies.
Cochrane Quality assessment tool
Random sequence generation (selection bias)
Allocation concealment (selection bias)
Blinding of participants and personnel (performance bias)
Blinding of outcome assessment (detection bias)
Incomplete outcome data addressed (attrition bias)
Selective reporting (reporting bias)
Other sources of bias
Kakkilaya et al., 2011
High risk
High risk
Low risk
High risk
Low risk
Low risk
Low risk
Muthusamy et al., 2012
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
Haward et al., 2012
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
Tucker Edmonds et al., 2014
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
High risk
Kett et al., 2016
Low risk
Low risk
Low risk
Low risk
Low risk
Low risk
High risk
MINORS tool
Item 1
Item 2
Item 3
Item 4
Item 5
Item 6
Item 7
Item 8
Item 9
Item 10
Item 11
Item 12
Zupancic et al., 2002
2
1
2
2
1
2
2
0
Kaempf et al., 2009
2
2
2
2
1
2
1
0
Guillen et al., 2012
2
0
2
2
1
2
2
2
2
2
2
2
Geurtzen et al., 2014
2
1
2
2
2
2
2
0
2
2
2
2
The MINORS (25) includes 12 items: clearly stated aim (item 1); inclusion of consecutive patients (item 2); prospective data collection (item 3); endpoints appropriate to the aim (item 4); unbiased assessment of the endpoints (item 5); adequate length of follow-up (item 6); loss to follow-up less than 5% (item 7); calculation of the study size (item 8); adequate control group (item 9); contemporary groups (item 10); baseline equivalence of groups (item 11); adequate statistical analysis (item 12). Items 1–8 refer to all of nonrandomized studies, while additional 4 items only apply to comparative studies. Each item is scored 0 (not reported), 1 (reported but inadequate), or 2 (reported and adequate).
