Table 1. Characteristics of surgical patients with and without myasthenia gravis.
| No MG (N = 22900) | MG (N = 2290) | ||||
|---|---|---|---|---|---|
| n | (%) | n | (%) | P | |
| Sex | 0.7208 | ||||
| Female | 14247 | (62.2) | 1416 | (61.8) | |
| Male | 8653 | (37.8) | 874 | (38.2) | |
| Age, years | 0.9894 | ||||
| 20–29 | 2435 | (10.6) | 248 | (10.8) | |
| 30–39 | 3370 | (14.7) | 339 | (14.8) | |
| 40–49 | 4882 | (21.3) | 493 | (21.5) | |
| 50–59 | 4811 | (21.0) | 485 | (21.2) | |
| 60–69 | 3400 | (14.9) | 328 | (14.3) | |
| ≥70 | 4002 | (17.5) | 397 | (17.3) | |
| Operation in teaching hospital | 21539 | (94.1) | 2157 | (94.2) | 0.7937 |
| Low income | 575 | (2.5) | 65 | (2.8) | 0.3423 |
| Coexisting medical conditions | |||||
| Mental disorders | 4890 | (21.4) | 497 | (21.7) | 0.6975 |
| Hypertension | 4950 | (21.6) | 493 | (21.5) | 0.9229 |
| Diabetes | 2559 | (11.2) | 251 | (11.0) | 0.7565 |
| COPD | 2509 | (11.0) | 252 | (11.0) | 0.9441 |
| Hyperlipidemia | 1287 | (5.6) | 139 | (6.1) | 0.3745 |
| Liver cirrhosis | 371 | (1.6) | 41 | (1.8) | 0.5401 |
| Congestive heart failure | 334 | (1.5) | 34 | (1.5) | 0.9206 |
| Renal dialysis | 96 | (0.4) | 13 | (0.6) | 0.3020 |
| Type of surgery | 0.9996 | ||||
| Skin | 429 | (1.9) | 43 | (1.9) | |
| Breast | 435 | (1.9) | 45 | (2.0) | |
| Musculoskeletal | 3666 | (16.0) | 362 | (15.8) | |
| Respiratory | 3596 | (15.7) | 363 | (15.9) | |
| Cardiovascular | 1432 | (6.3) | 144 | (6.3) | |
| Digestive | 3063 | (13.4) | 308 | (13.5) | |
| Kidney, ureter, bladder | 1377 | (6.0) | 132 | (5.8) | |
| Delivery, CS, abortion | 1186 | (5.2) | 123 | (5.4) | |
| Neurosurgery | 1820 | (8.0) | 179 | (7.8) | |
| Eye | 502 | (2.2) | 56 | (2.5) | |
| Other | 5394 | (23.6) | 535 | (23.4) | |
| Type of anesthesia | 0.7590 | ||||
| General | 17595 | (76.8) | 1753 | (76.6) | |
| Epidural or spinal | 5305 | (23.2) | 537 | (23.4) | |
COPD = chronic obstructive pulmonary disease; MG = myasthenia gravis.