Examples:  " Correlating grocery shopping patterns with incidence of obesity and diabetes Measuring response rates to cholesterol-lowering drugs by correlating pharmacy refills with exercise data from wearable sensors Correlating physical distance to hospitals and pharmacies with utilization of healthcare services Analyzing the influence of social network connections on lifestyle choices and treatment compliance." http://www.allanalytics.com/author.asp?section_id=3314&doc_id=273502&f_src=allanal