Table 1 How baseline characteristics were measured
Characteristic | Data source |
|---|---|
Demographic characteristics | |
Age | Membership file |
Gender | Membership file |
Race | Membership file and electronic medical record (EMR) |
BMI | EMR (BMI; weight in kg/height in m2) |
Smoking Status | EMR |
Clinical characteristics | |
Hypertension | ICD-9 codes 401.xx – 405.xx, or systolic >140 or diastolic >90 |
Hyperlipidemia | ICD 9 code 272.x, or total cholesterol >199mg/dL, or low density lipoprotein >129mg/dL |
Ischemic stroke | ICD 9 codes: 433.xx, 434.xx, 436, 438.0-438.53, 438.8-438.82, 438.89, 438.9, 997.02 |
Transient ischemic attack | ICD 9 codes: 435.xx |
Hypothyroidism | ICD 9 codes: 243, 244.xx |
Chronic lung disease | ICD 9 codes: 490, 491–491.21, 491.8, 491.9, 492.xx, 493.0x, 493.1x, 493.2x, 493.9x, 494.x, 495, 495.0, 495.2-495.9, 496, 518.1, 518.2 |
Aortic/mitral valvular disease | ICD 9 codes: 395.xx, 424.0, 424.1, 746.3-746.6, 746.81, 394.xx, 396.xx |
Depression | ICD 9 codes: 296.2x-296.6x, 296.7, 296.8, 296.80, 296.82, 296.89, 300.4, 301.12, 309.1, 311 |
Atrial fibrillation or flutter | ICD 9 codes: 427.3x |
Diabetes | Health plan diabetes registry |
Coronary artery disease/acute myocardial infarction | ICD 9 codes: 410.xx – 414.xx, excluding 414.10, 414.11, 414.19 |
Peripheral vascular disease | ICD 9 codes: 250.7x, 440.xx, 443.81, 443.9 |
Left ventricular wall thickness | echocardiogram |
Ejection fraction | echocardiogram |
Laboratory characteristics | |
Renal function | Outpatient laboratory values for serum creatinine (glomerular filtration rate estimated from MDRD equation) |