Patient characteristics associated with missed visits
| Factor | Missed (N=3768) | Completed (N=43,263) | P value | Adjusted OR for missed visits (95% CI) | P value |
| Age (years), mean±SD | 52.9±17.8 | 56.6±17.5 | <0.001 | 0.99 (0.98 to 0.99) for every 1 year increase in age | <0.001 |
| Age ≥65 years, n (%) | 1098 (29.1) | 16,260 (37.6) | <0.001 | ||
| Sex, n (%) | 0.46 | ||||
| Male | 1456 (38.6) | 16,459 (38) | |||
| Female | 2312 (61.4) | 26,804 (62) | |||
| Race, n (%) | <0.001 | ||||
| White | 2471 (65.7) | 33,432 (77.3) | Reference | ||
| Black | 808 (21.5) | 5993 (13.9) | 1.42 (1.29 to 1.57) | <0.001 | |
| Hispanic | 216 (5.7%) | 1577 (3.6) | 1.34 (1.13 to 1.57) | <0.001 | |
| Others | 268 (7.1%) | 2220 (5.1) | 1.44 (1.25 to 1.66) | <0.001 | |
| Type of insurance, n (%) | |||||
| Private | 1955 (53.3) | 26 461 (62.4) | <0.001 | Reference | |
| Medicare | 693 (18.9) | 8981 (21.2) | 1.05 (0.95 to 1.16) | 0.29 | |
| Medicaid and other public | 984 (26.8) | 6433 (15.2) | 1.35 (1.23 to 1.48) | <0.001 | |
| No insurance | 35 (1) | 504 (1.2) | 1.04 (0.73 to 1.47) | 0.81 | |
| Median household income by zip code (by quartile), n (%) | |||||
| Lowest | 1304 (34.6) | 10,321 (23.9) | <0.001 | Reference | |
| Second | 1093 (29) | 10,698 (24.7) | 1.02 (0.92 to 1.12) | 0.64 | |
| Third | 664 (17.6) | 11,182 (25.8%) | 0.64 (0.58 to 0.72) | <0.001 | |
| Highest | 707 (18.8%) | 11,059 (25.6%) | 0.71 (0.63 to 0.79) | <0.001 | |
| Employment status, n (%) | |||||
| Employed | 1234 (32.8) | 16,868 (39) | <0.001 | Reference | |
| Unemployed | 1959 (52) | 16.783 (38.8) | 1.45 (1.33 to 1.58) | <0.001 | |
| Retired | 488 (13) | 8709 (20.2) | 0.99 (0.88 to 1.13) | 0.99 | |
| Unknown | 84 (2.2) | 852 (2) | 0.98 (0.73 to 1.30) | 0.88 | |
| Marital status | |||||
| Married | 1565 (41.5) | 21,463 (49.6) | <0.001 | Reference | |
| Single | 2153 (57.1) | 21,206 (49) | 1.09 (1.01 to 1.17) | 0.023 | |
| Others | 50 (1.3) | 593 (1.4) | 0.94 (0.68 to 1.29) | 0.71 | |
| H/o tobacco use | 756 (20.4) | 5903 (13.8) | <0.001 | 1.23 (1.12 to 1.35) | <0.001 |
| H/o alcohol use | 1555 (43.2) | 18,694 (45) | 0.074 | ||
| H/o illicit drug use | 352 (9.7) | 2657 (6.4) | <0.001 | 1.14 (1.01 to 1.29) | 0.03 |
| Primary language | |||||
| English | 3639 (96.6) | 42 355 (97.9) | <0.001 | Reference | |
| Spanish | 64 (1.7%) | 413 (1.0) | 1.20 (0.89 to 1.63) | 0.21 | |
| Other | 65 (1.7) | 495 (1.1) | 1.37 (1.03 to 1.82) | 0.028 | |