The study results showed that the sensitivity of the score Alvarado at 6 points was 81% (95% CI: 71 - 88), specificity was 64% (95% CI: 54 - 73), positive predictive value as 72% (95% CI: 62. 79); negative predictive value was 75% (95% CI: 64 - 84); OR was 7.6 (95% CI: 15.2 3, 8 -), area under the curve AUC is 0.79.