“…Comorbidities prior to the index date that are potentially related to acute pancreatitis include alcohol‐related diseases (ICD‐9 codes 291, 303, 305.00, 305.01, 305.02, 305.03, 571.0‐571.3, 790.3, and V11.3), biliary stone (ICD‐9 code 574), cardiovascular diseases including coronary artery disease, heart failure, cerebrovascular disease, and peripheral atherosclerosis (ICD‐9 codes 410‐414, 428, 430‐438, and 440‐448), chronic kidney disease (ICD‐9 codes 585‐586 and 588.8‐588.9), chronic obstructive pulmonary disease (ICD‐9 codes 491, 492, 493, and 496), hepatitis B infection (ICD‐9 codes V02.61, 070.20, 070.22, 070.30, and 070.32), hepatitis C infection (ICD‐9 codes V02.62, 070.41, 070.44, 070.51 and 070.54), hyperparathyroidism (ICD‐9 code 252.0), and hypertriglyceridemia (ICD‐9 code 272.1, 272.2, and 272.4). Based on ICD‐9 codes, the diagnosis accuracy of included comorbidities has been well examined in previous studies …”