Table 1.
Characteristics of the Population by Survey Response Phase
| Variable | First Mail (N = 1617) | Second Mail (N = 957) | Phone (N = 863) | Total Responders (N = 3437) | Total Sample (N = 6716) |
|---|---|---|---|---|---|
| Background | |||||
| Male | 790 (48.9%)* | 515 (53.8%) | 451 (52.3%) | 1,756 (51.1%) | 3,530 (52.6%) |
| Age | |||||
| 18 to <35 | 209 (12.9%)* | 147 (15.4%) | 147 (17%) | 503 (14.6%)* | 1,127 (16.8%) |
| 35 to <50 | 403 (24.9%)* | 315 (32.9%) | 356 (41.3%)* | 1,074 (31.2%) | 2,201 (32.8%) |
| 50 to <65 | 510 (31.5%)* | 304 (31.8%)* | 245 (28.4%) | 1,059 (30.8%)* | 1,887 (28.1%) |
| 65+ | 495 (30.6%)* | 191 (20%) | 115 (13.3%)* | 801 (23.3%) | 1,501 (22.3%) |
| White | 1,467 (90.7%)* | 858 (89.7%)* | 761 (88.2%) | 3,086 (89.8%)* | 5,833 (86.9%) |
| Clinical | |||||
| Charlson (weighted), 2+ | 451 (27.9%)* | 222 (23.2%) | 190 (22%) | 863 (25.1%) | 1,652 (24.6%) |
| Myocardial infarct | 72 (4.5%) | 37 (3.9%) | 36 (4.2%) | 145 (4.2%) | 308 (4.6%) |
| Congestive heart failure | 80 (4.9%) | 35 (3.7%) | 20 (2.3%)* | 135 (3.9%)* | 334 (5%) |
| Peripheral vascular disease | 90 (5.6%) | 44 (4.6%) | 38 (4.4%) | 172 (5%) | 334 (5%) |
| Cerebrovascular disease | 124 (7.7%) | 58 (6.1%) | 40 (4.6%)* | 222 (6.5%) | 467 (7%) |
| Chronic pulmonary disease | 253 (15.6%) | 137 (14.3%) | 145 (16.8%) | 535 (15.6%) | 1,011 (15.1%) |
| Ulcer | 103 (6.4%) | 48 (5%) | 47 (5.4%) | 198 (5.8%) | 374 (5.6%) |
| Mild liver disease | 37 (2.3%) | 19 (2%) | 18 (2.1%) | 74 (2.2%) | 154 (2.3%) |
| Diabetes | 170 (10.5%) | 84 (8.8%) | 86 (10%) | 340 (9.9%) | 661 (9.8%) |
| Diabetes with organ damage | 46 (2.8%) | 23 (2.4%) | 27 (3.1%) | 96 (2.8%) | 199 (3%) |
| Moderate/severe renal disease | 93 (5.8%) | 45 (4.7%) | 31 (3.6%)* | 169 (4.9%) | 373 (5.6%) |
| Moderate/severe liver disease | 9 (0.6%) | 1 (0.1%) | 3 (0.3%) | 13 (0.4%) | 28 (0.4%) |
| Metastatic solid tumor | 34 (2.1%) | 17 (1.8%) | 15 (1.7%) | 66 (1.9%) | 134 (2%) |
| Rheumatologic disease | 43 (2.7%) | 20 (2.1%) | 16 (1.9%) | 79 (2.3%) | 153 (2.3%) |
| Other cancer | 242 (15%)* | 113 (11.8%) | 80 (9.3%)* | 435 (12.7%) | 790 (11.8%) |
| Utilization | |||||
| 3+ Clinic office | 1169 (72.3%)* | 636 (66.5%)* | 530 (61.4%) | 2,335 (67.9%)* | 4,192 (62.4%) |
| Any ER admission | 451 (27.9%)* | 276 (28.8%) | 278 (32.2%) | 1,005 (29.2%) | 2,027 (30.2%) |
| Any hospital admission | 365 (22.6%) | 183 (19.1%)* | 186 (21.6%) | 734 (21.4%) | 1,468 (21.9%) |
| 1+ Surgical or nonsurgical procedures in last 10 years | 1,039 (64.3%)* | 552 (57.7%) | 494 (57.2%) | 2,085 (60.7%)* | 3,873 (57.7%) |
*
Significant difference from total sample, p < 0.05.