Database: thrombosis_prediction
Question: What is the average age of the male patient with high cholesterol?
SQL: SELECT AVG(STRFTIME('%Y', date('NOW')) - STRFTIME('%Y', T1.Birthday)) FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.`T-CHO` >= 250 AND T1.SEX = 'M'