Table 1. Patient Characteristics.
| Characteristic | Medical Center Site | P Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| LAC-USC (Intervention) | Harbor-UCLA (Control) | |||||||||
| Before (n = 133) | After (n = 336) | Follow-up (n = 1002) | P Value | Before (n = 288) | After (n = 297) | Follow-up (n = 511) | P Value | Time-by-Group Interaction | Baseline Comparison | |
| Age at surgery, y | ||||||||||
| Mean (SD) | 61.7 (11.5) | 60.7 (11.7) | 62.0 (11.1) | .18 | 60.9 (10.4) | 59.9 (10.9) | 60.6 (10.8) | .47 | .80 | .49 |
| Median (IQR) [range] | 63 (55-71) [31-86] | 62 (53-68) [25-94] | 62 (56-68) [19-91] | 61 (55-67) [26-88] | 60 (53-66) [25-89] | 61 (54-67) [21-101] | ||||
| Sex, No. (%) | ||||||||||
| Male | 74 (56) | 171 (51) | 435 (43) | .02 | 125 (43) | 138 (46) | 236 (46) | .70 | .03 | .02 |
| Female | 59 (44) | 165 (49) | 567 (57) | 163 (57) | 159 (54) | 275 (54) | ||||
| Race/ethnicity, No. (%) | ||||||||||
| Hispanic | 107 (80) | 270 (80) | 715 (71) | <.001 | 186 (65) | 208 (70) | 290 (57) | <.001 | .73 | <.001 |
| Non-Hispanic | 24 (18) | 56 (17) | 174 (17) | 101 (35) | 89 (30) | 169 (33) | ||||
| Unknown | 2 (2) | 10 (3) | 113 (11) | 1 (<1) | 0 | 52 (10) | ||||
| Mean (SD) Charlson comorbidity index | 0.5 (1.3) | 1.1 (1.4) | 1.6 (1.7) | <.001 | 1.3 (1.5) | 1.4 (1.4) | 1.5 (1.6) | .02 | <.001 | <.001 |
Abbreviations: IQR, interquartile range.