Table 1.
Comparison of baseline characteristics between matched nonobese and morbidly obese patients
| Baseline characteristics | Nonobese (n = 90,442) | Morbidly obese (n = 90,143) | p value* |
|---|---|---|---|
| Number (%) | Number (%) | ||
| Age (years; mean; range) | 61 (22–90) | 61 (22–90) | NA |
| Female | 67,859 (75) | 67,682 (75) | 0.79 |
| Comorbidities | |||
| Obstructive sleep apnea | 19,249 (21) | 19,147 (21) | 0.82 |
| AIDS | 0 (NA) | 0 (NA) | NA |
| Alcohol abuse | 223 (0.2) | 228 (0.2) | 0.78 |
| Deficiency anemia | 11,708 (13) | 11,697 (13) | 0.84 |
| Rheumatoid arthritis/collagen vascular disease | 2528 (2.8) | 2525 (2.8) | 0.93 |
| Chronic blood loss anemia | 1664 (1.8) | 1630 (1.8) | 0.61 |
| Congestive heart failure | 2324 (2.6) | 2322 (2.6) | 0.93 |
| Chronic pulmonary disease | 17,765 (19) | 17,670 (19) | 0.82 |
| Coagulopathy | 654 (0.7) | 641 (0.7) | 0.76 |
| Depression | 13,714 (15) | 13,680 (15) | 0.94 |
| Diabetes uncomplicated | 28,468 (31) | 28,340 (31) | 0.86 |
| Diabetes with chronic complications | 1950 (2.2) | 1929 (2.1) | 0.81 |
| Drug abuse | 139 (0.2) | 145 (0.2) | 0.70 |
| Hypertension (uncomplicated and complicated) | 69,738 (77) | 69,580 (77) | 0.68 |
| Hypothyroidism | 13,520 (15) | 13,513 (15) | 0.80 |
| Liver disease | 428 (0.5) | 429 (0.5) | 0.93 |
| Lymphoma | 56 (0.1) | 57 (0.1) | 0.91 |
| Fluid and electrolyte disorder | 6367 (7) | 6,353 (7) | 0.94 |
| Metastatic cancer | 10 (< 0.1) | 10 (< 0.1) | 0.99 |
| Other neurological disorders | 2122 (2.3) | 2078 (2.3) | 0.56 |
| Paralysis | 74 (0.1) | 77 (0.1) | 0.79 |
| Peripheral vascular disease | 851 (0.9) | 845 (0.9) | 0.93 |
| Psychoses | 1257 (1.4) | 1232 (1.4) | 0.67 |
| Pulmonary circulation disorders | 538 (0.6) | 539 (0.6) | 0.93 |
| Renal failure | 1995 (2.2) | 1977 (2.2) | 0.85 |
| Solid tumor without metastasis | 111 (0.1) | 108 (0.1) | 0.85 |
| Peptic ulcer disease excluding bleeding | <10 (< 0.1) | <10 (< 0.1) | 0.99 |
| Valvular heart disease | 2170 (2.4) | 2185 (2.4) | 0.73 |
| Weight loss | 20 (< 0.1) | 19 (< 0.1) | 0.88 |
* Pearson chi square; NA = not applicable.