Clinical prediction score for superficial surgical site infection after appendectomy in adults with complicated appendicitis

Table 3 Risk stratification of prediction values of scoring system

Risk classification	Scores	Outcome		Sensitivity (%)	Specificity (%)	Correctly classify (%)	LR+^a	Posttest probability (95% CI)^b
Risk classification	Scores	SSI	No SSI	Sensitivity (%)	Specificity (%)	Correctly classify (%)	LR+^a	Posttest probability (95% CI)^b
Low	1–1.3	21	411	85.4	41.2	8.84	1.453	12.2 (9.0, 15.5)
Moderate	2–2.5	18	74	56.3	83.0	80.7	3.315	24.0 (18.5, 29.5)
High	> 2.5	9	10	18.8	98.0	91.0	9.281	46.9 (38.8, 53.9)

Coefficient of constant term in the final model (− 3.70) was omitted for easier understanding and interpretation
^aCompared to patients with very low risk (score = 0)
^bBased on pretest probability, incidence of SSI, of 8.7%
CI confidence interval, LR likelihood ratio, SSI superficial surgical site infection

ISSN: 1749-7922