Measure of effects
If continuous, data will be reported as mean and standard deviation with a 95% confidence interval (CI). For categorical data, estimates of odds ratio (OR) and risk ratio (RR) with 95% CI will be used for reporting.Odds ratio will be extracted and reported for observational studies where the estimation of risk is difficult, such as analytical cross-sectional studies and case–control studies. Risk ratio (95%CI) will be extracted and reported for longitudinal studies (e.g., cohort studies) and experimental studies (RCTs and NRCTs). The final results will be reported as RR (95% CI), as relative risk or risk ratio is considered as a more intuitive measure of effect and is easy to interpret [