Database: thrombosis_prediction
Question: Among the patients whose creatinine level is abnormal, how many of them aren't 70 yet?
SQL: SELECT COUNT(DISTINCT T1.ID) FROM Patient AS T1 INNER JOIN Laboratory AS T2 ON T1.ID = T2.ID WHERE T2.CRE >= 1.5 AND STRFTIME('%Y', Date('now')) - STRFTIME('%Y', T1.Birthday) < 70