What is the average body mass index for patients with higher total cholesterol?
average body mass index = DIVIDE(SUM(observations.VALUE), COUNT(PATIENT) WHERE observations.DESCRIPTION = 'Body Mass Index'); body mass index refers to observations.DESCRIPTION = 'Body Mass Index'; higher total cholesterol refers to observations.DESCRIPTION = 'Total Cholesterol' and observations.VALUE > = 200;
SELECT SUM(T1.VALUE) / COUNT(T1.PATIENT) FROM observations AS T1 INNER JOIN ( SELECT DISTINCT PATIENT FROM observations WHERE DESCRIPTION = 'Total Cholesterol' AND VALUE > 200 ) AS T2 ON T1.PATIENT = T2.PATIENT WHERE T1.DESCRIPTION = 'Body Mass Index'