Table 1. Characteristics of Patients With Appendicitis.
| Characteristic | Total No. | Appendicitis group, No. (%) | P value | |
|---|---|---|---|---|
| Simple | Complicated | |||
| No. | 67 489 | 36 266 (53.7) | 31 223 (46.3) | |
| Age, y | <.001 | |||
| Mean (SD) | 10.5 (3.9) | 11.0 (3.6) | 9.9 (4.0) | |
| Median (IQR) [range] | 11 (8-14) [0-18] | 11 (8-14) [0-14] | 10 (7-13) [0-18] | |
| Sex | ||||
| Female | 26 929 (39.9) | 14 210 (39.2) | 12 719 (40.7) | <.001 |
| Male | 40 549 (60.1) | 22 049 (60.8) | 18 500 (59.3) | |
| Unknown | 11 (0.02) | 7 (0.01) | 4 (0.01) | |
| Race and ethnicity | ||||
| Asian | 1699 (2.5) | 869 (2.4) | 830 (2.7) | <.001 |
| Hispanic | 24 234 (35.9) | 12 008 (33.1) | 12 226 (39.2) | |
| Non-Hispanic | ||||
| Black | 4447 (6.6) | 2363 (6.5) | 2084 (6.7) | |
| White | 29 234 (43.3) | 16 721 (46.1) | 12 513 (40.1) | |
| Othera | 7875 (11.7) | 4305 (11.9) | 3570 (11.4) | |
| Insurance | ||||
| Private | 28 991 (43.0) | 16 776 (46.3) | 12 215 (39.1) | <.001 |
| Public (Medicaid/CHIP) | 32 343 (47.9) | 16 347 (45.1) | 15 996 (51.2) | |
| Other | 6155 (9.1) | 3143 (8.7) | 3012 (9.6) | |
| Complex chronic condition | ||||
| Yes | 3607 (5.3) | 1877 (5.2) | 1730 (5.5) | .04 |
| No | 63 882 (94.7) | 34 389 (94.8) | 29 493 (94.5) | |
| COI level | ||||
| Very low | 15 488 (23.0) | 7433 (20.5) | 8055 (25.8) | <.001 |
| Low | 13 535 (20.1) | 6897 (19.0) | 6638 (21.3) | |
| Moderate | 12 668 (18.8) | 6821 (18.8) | 5847 (18.7) | |
| High | 11 487 (17.0) | 6633 (18.3) | 4854 (15.5) | |
| Very high | 14 311 (21.2) | 8482 (23.4) | 5829 (18.7) | |
| ED visit/30-d readmission | ||||
| Yes | 10 358 (15.4) | 4354 (12.0) | 6004 (19.2) | <.001 |
| No | 57 131 (84.7) | 31 912 (88.0) | 25 219 (80.8) | |
Abbreviations: CHIP, Children’s Health Insurance Program; COI, Child Opportunity Index; ED, emergency department.
a
Includes Native Hawaiian/Pacific Islander, American Indian, and Alaskan Native.