Table 1.
Characteristics of patients. Values are numbers (percentages)
| Characteristics | Initial period (n=2 555) | Rest of year (n=17 005) | P value* |
|---|---|---|---|
| Age (years): | |||
| <41 | 798 (31.2) | 5 456 (32.1) | 0.43† |
| 41-64 | 881 (34.5) | 5 934 (34.9) | |
| >64 | 876 (34.3) | 5 615 (33.0) | |
| Female sex | 972 (38.0) | 6 392 (37.6) | 0.65 |
| Comorbidities: | |||
| Anaemia (nutritional, haemolytic, aplastic, or other) | 182 (7.1) | 1 358 (8.0) | 0.13 |
| Diabetes mellitus | 303 (11.9) | 1 788 (10.5) | 0.04 |
| Disorder of thyroid or other endocrine glands | 68 (2.7) | 503 (3.0) | 0.40 |
| Malnutrition | 45 (1.8) | 458 (2.7) | <0.001 |
| Obesity | 230 (9.0) | 1 565 (9.2) | 0.74 |
| Signs involving cognitive functions (including coma) | 266 (10.4) | 2 259 (13.3) | <0.001 |
| Hypertensive diseases | 671 (26.3) | 4 627 (27.2) | 0.31 |
| Ischaemic heart diseases | 412 (16.1) | 2 829 (16.6) | 0.75 |
| Other heart diseases (including valve disorders, heart failure) | 488 (19.1) | 3 200 (18.8) | 0.60 |
| Cerebrovascular diseases | 138 (5.4) | 933 (5.5) | 0.85 |
| Chronic lower respiratory diseases | 410 (16.0) | 2 674 (15.7) | 0.67 |
| Other diseases of the respiratory system | 151 (5.9) | 1 067 (6.3) | 0.47 |
| Liver diseases, including hepatitis and cirrhosis | 58 (2.3) | 474 (2.8) | 0.13 |
| Diseases of musculoskeletal system/connective tissue | 314 (12.3) | 2 871 (16.9) | <0.001 |
| Renal failure | 90 (3.5) | 655 (3.9) | 0.41 |
| Shock, including hypovolaemic and septic shock | 73 (2.9) | 488 (2.9) | 0.97 |
| ASA-PS score: | |||
| 1 | 694 (27.2) | 4 017 (23.6) | <0.001† |
| 2 | 900 (35.2) | 5 869 (34.5) | |
| 3 | 713 (27.9) | 5 385 (31.7) | |
| 4 | 227 (8.9) | 1 610 (9.5) | |
| 5/6 | 21 (0.8) | 124 (0.7) | |
| Type of procedure: | |||
| Dermatological and plastic | 126 (4.9) | 1 254 (7.4) | <0.001 |
| Nervous system | 216 (8.5) | 1 122 (6.6) | |
| Cardiovascular system | 358 (14.0) | 2 313 (13.6) | |
| Respiratory system (ICD6) | 56 (2.2) | 412 (2.4) | |
| Blood and blood forming organs | 38 (1.5) | 255 (1.5) | |
| Digestive system | 662 (25.9) | 4 409 (25.9) | |
| Musculoskeletal system | 544 (21.3) | 3 895 (22.9) | |
| Ear, nose, mouth, pharynx | 79 (3.1) | 443 (2.6) | |
| Endocrine system | 25 (1.0) | 123 (0.7) | |
| Urinary system/male genital organs | 223 (8.7) | 1 126 (6.6) | |
| Female genital organs and breast | 149 (5.8) | 976 (5.7) | |
| Eye and adnexa | 35 (1.4) | 337 (2.0) | |
| Mastoid process and dental services | 12 (0.5) | 52 (0.3) | |
| Miscellaneous | 32 (1.3) | 288 (1.7) | |
| Type of anaesthesia: | |||
| General | 1 891 (74.1) | 13 591 (79.9) | <0.008 |
| Combined general | 66 (2.6) | 497 (2.8) | |
| Epidural/spinal | 104 (4.0) | 533 (3.1) | |
| Local or loco-regional | 149 (5.8) | 1 121 (6.6) | |
| Mask anaesthesia, sedation, or monitoring | 343 (13.5) | 1 264 (7.6) |
ASA-PS=American Society of Anesthesiologists physical status.
*For χ2 test and Fisher exact test for values <5.
†P value for χ2 test for linear trend.