Baseline characteristics of IBD hospitalizations with and without psoriasis
| Variables | IBD (N=184 120) | ||
| Without psoriasis (n=181 865) | With psoriasis (n=2255) | P value | |
| Age (years) | 44.79 | 45.03 | 0.767 |
| Female | 52.79 | 59.87 | 0.003 |
| Race | <0.0001 | ||
| White | 72.99% | 87.27% | Reference |
| Black | 14.53% | 3.01% | <0.0001 |
| Hispanic | 7.95% | 6.94% | 0.101 |
| Asians | 1.36% | 1.39% | 0.740 |
| Native Americans | 0.41% | 0.23% | 0.462 |
| Others | 2.76% | 1.16% | 0.021 |
| Charleston Comorbidity Index | 0.0768 | ||
| 0 | 68.17% | 63.41% | |
| 1 | 18.54% | 23.28% | |
| 2 | 6.83% | 6.65% | |
| ≥3 | 6.45% | 6.65% | |
| Hospital bed size | 0.7039 | ||
| Small | 18.44% | 17.52% | |
| Medium | 28.18% | 27.05% | |
| Large | 53.38% | 55.43% | |
| Hospital teaching status | 0.0821 | ||
| Non-teaching | 28.9% | 25.06% | |
| Teaching | 7.11% | 74.94% | |
| Hospital location | 0.0660 | ||
| Rural | 7.07% | 4.88% | |
| Urban | 92.93% | 95.12% | |
| Expected primary payer | 0.0060 | ||
| Medicare | 25.67% | 23.57% | |
| Medicaid | 20.08% | 17.62% | |
| Private | 48.49% | 55.84% | |
| Self-pay | 5.75% | 2.97% | |
| Median household income (quartile) | 0.0012 | ||
| First (0–25th) | 26.29% | 21.75% | |
| Second (26th–50th) | 25.27% | 2.04% | |
| Third (51st–75th) | 25.13% | 2.87% | |
| Fourth (76th–100th) | 23.31% | 29.15% | |
| Hospital region | 0.0765 | ||
| Northeast | 21.45% | 25.72% | |
| Midwest | 24.37% | 23.73% | |
| South | 3.82% | 33.04% | |
| West | 15.98% | 17.52% | |
| Comorbidities | |||
| Dyslipidemia | 12.79% | 16.19% | 0.0341 |
| Old MI | 1.77% | 1.33% | 0.4856 |
| Old PCI | 0.17% | 0% | 0.3861 |
| Old CABG | 1.13% | 0.89% | 0.6243 |
| Old pacemaker | 0.60% | 0.67% | 0.8571 |
| Atrial fibrillation/flutter | 3.14% | 3.33% | 0.8195 |
| COPD | 5.11% | 3.99% | 0.2791 |
| Old stroke | 2.28% | 2.66% | 0.5914 |
| Hypertension | 23.53% | 27.49% | 0.0571 |
| Peripheral vessel disease | 0.78% | 1.33% | 0.1932 |
| Hypothyroidism | 6.21% | 10.86% | <0.0001 |
| DM types 1 and 2 | 9.20% | 11.75% | 0.0601 |
| Obesity | 8.12% | 11.75% | 0.0051 |
| CHF | 2.54% | 1.33% | 0.1045 |
| CKD | 4.36% | 3.99% | 0.7144 |
| Liver disease | 3.78% | 5.76% | 0.0277 |
| Electrolyte derangement | 26.93% | 26.16% | 0.7227 |
| Maintenance hemodialysis | 0.32% | 0% | 0.2323 |
| O2 dependence | 0.45% | 0.44% | 0.9951 |
| Smoking | 19.87% | 25.28% | 0.0061 |
| Anemia | 37.51% | 35.03% | 0.2812 |
| CAD | 5.01% | 4.43% | 0.5793 |
| On anticoagulation | 3.42% | 3.1% | 0.7298 |
CABG, coronary artery bypass graft; CAD, coronary artery disease; CHF, chronic congestive heart failure; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; DM, diabetes mellitus; IBD, inflammatory bowel disease; median household income, median household income for patient’s Zip code; MI, myocardial infarction; PCI, percutaneous coronary intervention.