Figure 1 - Caries-inhibiting effect of fluoride gel treatment (PF with 95% confidence intervals) in 19 studies.

From the following article

Further statistics in dentistry Part 8: Systematic reviews and meta-analyses

A Petrie, J S Bulman & J F Osborn

British Dental Journal 194, 73 - 78 (2003) Published online: 25 January 2003

doi:10.1038/sj.bdj.4809877

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The shaded area shows the 95% confidence interval for the pooled PF.6

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