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) |
BMI (Body mass index), EMR (electronic medical record), ICD-9 (International Classification of Diseases, 9th revision, clinical modification), MDRD (4-variable Modification of Diet in Renal Disease equation).