Table V.
Adjusted odds ratios associated with of sociodemographic, clinical, and procedure characteristics among colorectal surgery patients by minority-serving status of operative hospitals, California Inpatient Database 2004–2011 (N = 168,590)
| 30-day readmission | 90-day readmission | Repeated readmissions | |
|---|---|---|---|
|
|
|
|
|
| OR (95% CI) | OR (95% CI) | OR (95% CI) | |
| Minority serving status (ref = Non-MSH) | |||
| MSH | 1.02 (0.92, 1.12) | 1.04 (0.95, 1.13) | 1.10 (0.96, 1.26) |
| Age (ref = ≥75 y) | |||
| 50–64 | 0.94 (0.89, 0.99)* | 0.98 (0.94, 1.03) | 0.88 (0.79, 0.97)* |
| 65–74 | 0.82 (0.76, 0.89)† | 0.89 (0.83, 0.95)‡ | 0.68 (0.60, 0.77)† |
| 75+ | 0.94 (0.87, 1.01) | 1.05 (0.98, 1.13) | 0.79 (0.68, 0.91)‡ |
| Sex (ref = female) | |||
| Male | 1.01 (0.98, 1.04) | 0.97 (0.94, 0.99)* | 0.88 (0.83, 0.93)† |
| Charlson Comorbidity Score (ref = 0) | |||
| 1 | 1.25 (1.21, 1.30)† | 1.28 (1.24, 1.32)† | 1.42 (1.32, 1.53)† |
| 2+ | 1.73 (1.65, 1.81)† | 1.85 (1.77, 1.93)† | 2.22 (2.05, 2.40)† |
| Year | 1.02 (1.01, 1.03)† | 1.01 (1.00, 1.02)‡ | 1.03 (1.01, 1.05)† |
| Procedure type (ref = rectal) | |||
| Colon | 1.19 (1.12, 1.26)† | 1.19 (1.13, 1.25)† | 1.26 (1.13, 1.40)† |
| Zip code-level income‡ (ref = fourth quartile) | |||
| First quartile | 1.00 (0.95, 1.06) | 0.99 (0.95, 1.04) | 0.99 (0.89, 1.10) |
| Second quartile | 0.99 (0.94, 1.05) | 0.99 (0.95, 1.03) | 1.04 (0.95, 1.14) |
| Third quartile | 1.01 (0.96, 1.07) | 1.00 (0.96, 1.05) | 1.07 (0.98, 1.18) |
| Race (ref = NH white) | |||
| API | 0.92 (0.86, 0.98)§ | 0.88 (0.84, 0.93)† | 0.91 (0.79, 1.03) |
| Hispanic | 1.03 (0.99, 1.08) | 0.99 (0.95, 1.03) | 1.02 (0.94, 1.12) |
| NH black | 1.18 (1.10, 1.25)† | 1.10 (1.05, 1.17)† | 1.24 (1.11, 1.39)† |
| Other | 0.86 (0.79, 0.94)† | 0.84 (0.78, 0.91)† | 0.82 (0.68, 0.98)* |
| Primary insurance (ref = private) | |||
| Medicaid | 1.39 (1.29, 1.49)† | 1.47 (1.38, 1.56)† | 1.88 (1.66, 2.12)† |
| Medicare | 1.31 (1.24, 1.39)† | 1.36 (1.29, 1.43)† | 1.60 (1.43, 1.81)† |
| Other | 1.02 (0.95, 1.11) | 1.03 (0.96, 1.10) | 1.03 (0.88, 1.20) |
| Emergency status (ref = no) | |||
| Yes | 1.28 (1.23, 1.33)† | 1.36 (1.31, 1.41)† | 1.46 (1.35, 1.56)† |
| Laparoscopy (ref = no) | |||
| Yes | 0.77 (0.73, 0.82)† | 0.76 (0.72, 0.80)† | 0.71 (0.63, 0.79)† |
| Ostomy (ref = no) | |||
| Yes | 1.49 (1.42, 1.57)† | 1.59 (1.53, 1.67)† | 1.76 (1.63, 1.91)† |
| Procedure volume (ref = high) | |||
| Low | 1.02 (0.95, 1.08) | 1.07 (1.01, 1.13)* | 1.00 (0.89, 1.11) |
| Med | 1.00 (0.94, 1.06) | 1.01 (0.95, 1.07) | 1.00 (0.90, 1.11) |
| Bed size (ref = ≥400) | |||
| 1–99 | 0.85 (0.75, 0.96)§ | 0.78 (0.69, 0.89)† | 0.82 (0.67, 1.00) |
| 100–399 | 0.93 (0.86, 1.01) | 0.90 (0.84, 0.97)§ | 0.93 (0.82, 1.06) |
| Teaching hospital (ref = yes) | |||
| No | 0.91 (0.85, 0.96)§ | 0.92 (0.86, 0.98)§ | 0.84 (0.77, 0.92)† |
| Has cancer program (ref = yes) | |||
| No | 1.05 (0.99, 1.11) | 1.00 (0.95, 1.06) | 1.05 (0.96, 1.15) |
| Intensive care unit (ref = yes) | |||
| No | 1.05 (0.93, 1.19) | 1.06 (0.96, 1.18) | 0.96 (0.74, 1.24) |
| Wound management services (ref = res) | |||
| No | 0.98 (0.91, 1.04) | 0.95 (0.90, 1.01) | 1.05 (0.95, 1.16) |
| Physical rehabilitation facilities (ref = yes) | |||
| No | 1.06 (0.99, 1.14) | 1.05 (0.98, 1.12) | 1.08 (0.97, 1.21) |
| Nurse-to-bed ratio (ref = 0–2) | |||
| 2–3.5 | 1.02 (0.96, 1.09) | 1.02 (0.96, 1.08) | 1.02 (0.93, 1.13) |
| 3.5+ | 1.06 (0.98, 1.14) | 1.03 (0.96, 1.10) | 1.10 (0.98, 1.23) |
*
P < .05.
†
P < .001.
‡
Zip code-level income indicates the median income of the patient’s zip code area.
§
P < .01.
API, Asian-Pacific Islander; CI, confidence interval; MSH, minority-serving hospital; NH, non-hispanic; OR, odds ratio; Ref, reference.