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Figure 2 | BMC Public Health

Figure 2

From: Second hand smoke exposure and the risk of invasive meningococcal disease in children: systematic review and meta-analysis

Figure 2

Smoking by any smoker in the household and the risk of invasive meningococcal disease: subgroup analysis by methodological quality. Squares indicate the odds ratio and bars represent 95% confidence intervals (CI). Odds ratios more than one indicate smoke exposure in the household increases the risk of invasive meningococcal disease in children.

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