The Alvarado score, also known as the MANTRELS score, is used to help diagnose acute appendicitis. However, there are several other scores and criteria that can also aid in diagnosis. These include the Eskelinen score, the RIPASA score, the Al-Khayal score, and the AIR score. Each of these scoring systems uses different factors such as age, lab results, and imaging studies to determine the likelihood of acute appendicitis. While the Alvarado score is widely used and validated, it is important to consider other diagnostic tools as well to achieve an accurate diagnosis.