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. 2006 Dec 26;3(12):e494. doi: 10.1371/journal.pmed.0030494

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© 2006 Joshi et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The circles and the lines represent the point estimates and 95% CIs, respectively. The size of the circle indicates the study size, and the diamond indicates the pooled estimate (weighted average) and its 95% CI. The heterogeneity chi-square statistics are 142.6 (p < 0.01) for the medical students and 600.9 (p < 0.01), for all HCWs, indicating significant heterogeneity across studies. (a) Indicates estimate of TST positivity in nursing students at entry into nursing school. (b) Indicates estimate of TST positivity after 3 y in nursing school.