Table 1.
Baseline characteristics of the study sample from 2010 to 2017.
| Year | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | P value |
|---|---|---|---|---|---|---|---|---|---|
| N | 2133 | 2545 | 2145 | 1247 | 1520 | 969 | 2159 | 1339 | – |
| Age (y) | 65.72 ± 10.46 | 65.68 ± 10.22 | 65.90 ± 9.82 | 65.45 ± 10.07 | 65.38 ± 9.62 | 65.42 ± 9.73 | 65.71 ± 9.92 | 65.81 ± 9.61 | .6612 |
| Sex | .1235 | ||||||||
| Male | 777 (36%) | 948 (37%) | 798 (37%) | 465 (37%) | 562 (37%) | 376 (39%) | 840 (39%) | 505 (38%) | |
| Female | 1356 (64%) | 1597 (63%) | 1347 (63%) | 782 (63%) | 958 (63%) | 593 (61%) | 1319 (61%) | 834 (62%) | |
| Insurance type | .3296 | ||||||||
| Medicare | 1170 (55%) | 1310 (51%) | 1166 (54%) | 659 (53%) | 750 (49%) | 506 (52%) | 1128 (52%) | 722 (54%) | |
| Other | 963 (45%) | 1235 (49%) | 979 (46%) | 588 (47%) | 770 (51%) | 463 (48%) | 1031 (48%) | 617 (46%) | |
| Race | .6845 | ||||||||
| White | 1837 (86%) | 2201 (87%) | 1892 (88%) | 1086 (87%) | 1314 (86.5%) | 841 (87%) | 1870 (87%) | 1154 (86%) | |
| Black | 167 (8%) | 187 (7%) | 146 (7%) | 98 (8%) | 114 (7.5%) | 74 (8%) | 169 (8%) | 105 (8%) | |
| Other | 129 (6%) | 157 (6%) | 107 (5%) | 63 (5%) | 92 (6%) | 54 (5%) | 120 (5%) | 80 (6%) | |
| Diabetes | 566 (26.5%) | 638 (25.1%) | 559 (26.1%) | 308 (24.7%) | 347 (22.8%) | 235 (24.2%) | 544 (25.2%) | 351 (26.2%) | .4169 |
| Obesity | 748 (35.07%) | 1023 (40.2%) | 938 (43.7%) | 608 (48.8%) | 762 (50.1%) | 549 (56.7%) | 1239 (57.4%) | 772 (57.6%) | <.0001 |
| Current smoker | 267 (12.5%) | 323 (12.7%) | 282 (13.1%) | 187 (15%) | 230 (15.1%) | 152 (15.7%) | 374 (17.3%) | 239 (17.8%) | <.0001 |
| Cancer | 261 (12.2%) | 287 (11.3%) | 251 (11.7%) | 145 (11.6%) | 181 (11.9%) | 119 (12.3%) | 286 (13.2%) | 168 (12.5%) | .1208 |
| CVD | 127 (5.9%) | 145 (5.7%) | 118 (5.5%) | 78 (6.3%) | 81 (5.3%) | 60 (6.2%) | 122 (5.6%) | 82 (6.1%) | .8758 |
| CHF/pulmonary edema | 109 (5.1%) | 121 (4.7%) | 97 (4.5%) | 54 (4.3%) | 58 (3.8%) | 40 (4.1%) | 104 (4.8%) | 62 (4.6%) | .4499 |
| COPD | 192 (9%) | 262 (10.3%) | 181 (8.4%) | 103 (8.3%) | 13 (8.6%) | 104 (10.7%) | 189 (8.7%) | 121 (9%) | .5985 |
| CAD | 370 (17.3%) | 449 (17.6%) | 365 (17%) | 193 (15.5%) | 202 (13.3%) | 138 (14.2%) | 292 (13.5%) | 180 (13.4%) | <.0001 |
| Renal disease | 112 (5.2%) | 151 (5.9%) | 146 (6.8%) | 84 (6.7%) | 96 (6.3%) | 75 (7.7%) | 164 (7.6%) | 119 (8.9%) | <.0001 |
| Warfarin in week before surgery | 142 (6.7%) | 136 (5.3%) | 154 (7.2%) | 76 (6.1%) | 63 (4.1%) | 40 (4.1%) | 85 (3.9%) | 42 (3.1%) | <.0001 |
COPD, chronic obstructive pulmonary disease; CVD, cerebrovascular disease.