Cancer prevalence in Pakistan: meta-analysis of various published studies to determine variation in cancer figures resulting from marked population heterogeneity in different parts of the country

Prevalence of oral cancer in Pakistan. Forest plot showing prevalence (%) estimates with 95% confidence intervals and weights allocated to each study based on sample size. The overall pooled prevalence estimate was 0.09 or 9%; I2 =？99.7%: high heterogeneity; p value was significant (p？=？<？0.001