Table 2. Population comparison between August and other months.
| Characteristics a | Other Months Mean N = 768,851 (%) | August N = 468,758 (%) |
|---|---|---|
| Hospital geographic location | ||
| Paris | 119,292 (15.5) | 62,736 (13.4) |
| North west | 158,161 (20.6) | 98,808 (21.1) |
| North east | 170,139 (22.1) | 112,016 (23.9) |
| South west | 122,022 (15.9) | 77,426 (16.5) |
| South east | 199,238 (25.9) | 117,772 (25.1) |
| Hospital status | ||
| Teaching | 193,743 (25.2) | 135,150 (28.8) |
| Public or private non-for-profit | 188,714 (24.5) | 120,686 (25.7) |
| Private for profit | 386,394 (50.3) | 212,922 (45.4) |
| Year | ||
| 2007 | 132,938 (17.3) | 82,754 (17.7) |
| 2008 | 132,344 (17.2) | 79,542 (17.0) |
| 2009 | 128,653 (16.7) | 78,279 (16.7) |
| 2010 | 125,765 (16.4) | 76,188 (16.3) |
| 2011 | 125,135 (16.3) | 76,143 (16.2) |
| 2012 | 124,016 (16.1) | 75,852 (16.2) |
| Women | 401,291 (52.2) | 234,785 (50.1) |
| Age (years), mean (SD) | 58.2 (17.7) | 58.2 (18.6) |
| No. different Elixhauser comorbidities, b mean (SD) | 0.8 (1.1) | 0.8 (1.2) |
| Surgical procedure codes | ||
| Operation on the nervous system | 22,885 (3.0) | 15,550 (3.3) |
| Operation on the ear, nose, mouth and pharynx | 41,667 (5.4) | 23,078 (4.9) |
| Operation on the cardiovascular system | 120,218 (15.6) | 74,414 (15.9) |
| Operation on the hematologic and lymphatic system | 27,260 (3.5) | 21,341 (4.6) |
| Operation on the respiratory system | 11,232 (1.5) | 9,373 (2.0) |
| Operation on the digestive system | 73,106 (9.5) | 55,466 (11.8) |
| Operation on the urinary system | 18,047 (2.3) | 11,290 (2.4) |
| Operation on the genital organs | 85,180 (11.1) | 50,006 (10.7) |
| Operation on the endocrine system | 23,910 (3.1) | 11,786 (2.5) |
| Operation on the musculoskeletal system | 302,326 (39.3) | 169,365 (36.1) |
| Operation on the integumentary system | 113,465 (14.8) | 78,110 (16.7) |
| Procedure complexity, mean (SD) | 365.1 (290.8) | 359.8 (301.8) |
a p<.001 for all variables.
b Elixhauser comorbidities include congestive heart failure, cardiac arrhythmias, valvular disease, pulmonary circulation disorders, peripheral vascular disorders, hypertension uncomplicated/complicated, paralysis, other neurological disorders, chronic pulmonary disease, diabetes uncomplicated/complicated, hypothyroidism, renal failure, liver disease, peptic ulcer disease excluding bleeding, AIDS/HIV, lymphoma, metastatic cancer, solid tumour without metastasis, rheumatoid arthritis/collagen vascular diseases, coagulopathy, obesity, weight loss, fluid and electrolyte disorders, blood loss anaemia, deficiency anaemia, alcohol abuse, drug abuse, psychoses, and depression.