Improving nursing care protocols for diabetic patients through a systematic review and meta-analysis of recent years

Figure 2 Meta-analysis (mean difference method) of the publications studying intragroup differences (baseline vs post-treatment) in glycated haemoglobin at study completion and funnel plot (for publication bias). Note the box marking the three items with the biggest differences. CI: Confidence interval; MD: Mean difference; SD: Standard deviation; SE: Standard error.