Comparison of the Limitations of the Studies
The most common limitation in the selected studies is in the sample size of the studies. Sahoo et al (2015) and Xu and Xue (2016) fail to mention the sample selection process. Therefore, the applicability of the information they present is limited. Davis et al (2016) only used 40 Mexican-American women in their study. This is a very small sample to apply the results to a wider community and includes the members of only one community. Therefore, cultural factors such as the beliefs and attitudes of Mexicans towards factors affecting obesity could affect the results. Oelscher et al. (2015) also has a very small sample of slightly above 500 kids; hence, the results may not be representative of the entire population. The limitation of GBD 2015 Obesity Collaborators (2017) study is that it is done in many countries but does not evaluate the unique cultural factors that affect obesity rates in each of the populations evaluated. It may be unwise to generalize the results for all populations.