Table 11.
The frequencies of acute appendicitis diagnoses according to risk category, divided by sex
| Acute appendicitis | True appendicitis % |
CR (fold) |
|||
|---|---|---|---|---|---|
| Sex | Scoring system | Yes | No | ||
| Male | Alvarado (n) | 1490 | 392 | ||
| High (>8) | 203 (13.6) | 16 (4.0) | 92.7 | 1.58 | |
| Intermediate (5–8) | 1112 (74.6) | 253 (64.5) | 81.5 | ||
| Low (<5) | 175 (11.7) | 123 (31.3) | 58.7* | ||
| AIR (n) | 1355 | 355 | |||
| High (>8) | 239 (17.6) | 29 (8.1) | 89.2 | 1.54 | |
| Intermediate (5–8) | 956 (70.5) | 210 (59.1) | 82.0 | ||
| Low (<5) | 160 (11.8) | 116 (32.6) | 58.0* | ||
| RIPASA (n) | 1445 | 377 | |||
| Definite (≥12) | 279 (19.3) | 28 (7.4) | 90.9 | 3.89 | |
| High (7.5–11.5) | 926 (64.0) | 158 (41.9) | 85.4 | ||
| Low (5–7) | 229 (15.8) | 155 (41.1) | 59.6 | ||
| Unlikely (<5) | 11 (0.7) | 36 (9.5) | 23.4* | ||
| AAS (n) | 1384 | 377 | |||
| High (≥16) | 848 (61.2) | 120 (31.8) | 87.6 | 2.76 | |
| Intermediate (11–15) | 498 (35.9) | 175 (46.4) | 74.0 | ||
| Low (0–10) | 38 (2.7) | 82 (21.7) | 31.7* | ||
| Female | Alvarado (n) | 905 | 523 | ||
| High (>8) | 133 (14.6) | 16 (3.1) | 89.3 | 2.55 | |
| Intermediate (5–8) | 675 (74.5) | 327 (62.5) | 67.4 | ||
| Low (<5) | 97 (10.7) | 180 (34.4) | 35.0* | ||
| AIR (n) | 827 | 476 | |||
| High (>8) | 144 (17.4) | 28 (5.8) | 83.7 | 2.37 | |
| Intermediate (5–8) | 586 (70.8) | 270 (56.7) | 68.5 | ||
| Low (<5) | 97 (11.7) | 178 (37.3) | 35.3* | ||
| RIPASA (n) | 869 | 510 | |||
| Definite (≥12) | 140 (16.1) | 13 (2.5) | 91.5 | 3.89 | |
| High (7.5–11.5) | 530 (60.9) | 180 (35.3) | 74.6 | ||
| Low (5–7) | 179 (20.5) | 252 (49.4) | 41.5 | ||
| Unlikely (<5) | 20 (2.3) | 65 (12.7) | 23.5* | ||
| AAS (n) | 852 | 497 | |||
| High (≥16) | 313 (36.7) | 58 (11.6) | 84.4 | 2.49 | |
| Intermediate (11–15) | 452 (53.0) | 269 (54.1) | 62.7 | ||
| Low (0–10) | 87 (10.2) | 170 (34.2) | 33.9* | ||
Values are n (%) unless otherwise indicated. CR was calculated by dividing the appendicitis percentage in the highest risk category by the percentage in the lowest risk category (true positive rate/failure rate). Percentages in parentheses are row percentages, showing the distribution of patients in each risk category. *Corresponds to failure rate. CR, categorization resolution; AIR, Appendicitis Inflammatory Response; RIPASA, Raja Isteri Pengiran Anak Saleha Appendicitis; AAS, Adult Appendicitis Score.