18 For "major or minor" depression there were sufficient data to pool the Edinburgh postnatal depression scale at various cut points (7-16 inclusive) and the Beck depression inventory at cut point 10.
Four studies reported on Apgar scores 28, 29, 31, 34, but only three had sufficient data to pool 28, 31, 34, and four reported birth weight 28, 29, 31, 34.
Outcomes with sufficient data were pooled in a random effects meta-analysis to give overall odds ratios (ORs) with corresponding 95% CIs.Of the 278 studies assessed, 114 met inclusion criteria and 98 were used in subsequent meta-analyses.
For RVO, only the comparison between ranibizumab and sham according to mean VA change had sufficient data for pooling.
Of the 47 studies that evaluated cardiovascular medication use, sufficient data for pooling were available in 34 studies (39 separate cohorts as two cohorts were included in three studies [ 43, 66, 72] and three cohorts in one study [ 71]).
had sufficient data to extract and pool, namely reported mean, standard deviation (SD), and numbers of subjects according to treatments for continuous outcomes; number of patients according to treatment for dichotomous outcomes.
Had sufficient data to extract and pool, i.e., the reported mean, standard deviation (SD), number of subjects according to treatments for continuous outcomes, and number of patients according to treatment for dichotomous outcomes.
Source: Bughin [7], sample Constraints Dimensions Percent encountered Data Lack of quality 60 Lack of permission to use data 37 Lack of sufficient data 23 Talent Limited pool to recruit 29 Limited intelligence as to where and how to apply big data 15 Organization Big data org too low in organization 57 Big data IT not synchronized with function 47.
The other outcomes measured in these included studies could not be pooled because of lack of sufficient data.
Pooled estimates were calculated for groups with sufficient data.
One sample failed to produce sufficient data probably because insufficient library DNA was added at the pooling stage.
