This study evaluates the difference between PRISMA-7 and ER2 tool. There are some differences between PRISMA-7 and ER2 tool. The differences consist in evaluation criteria that are used to perform the both surveys. We suppose that evaluation criteria of PRISMA-7 is not accurately enough to calculate the length of hospital stay and to predict the short-term outcomes.

The "Program of Research on Integration of Services for the Maintenance of Autonomy" (PRISMA-7) is the Ministry of Health and Social Services' reference tool for the assessment of older ED users in Quebec (Canada). PRISMA-7 has been initially designed to screen disability in community-dwelling older adults and has never been validated for risk for short-term adverse events in older ED users. "Emergency room evaluation and recommendations" (ER2) is another clinical tool which is currently evaluated in Quebec. Compared to PRISMA-7, ER2 has been especially designed for assessing risk for short-term ED adverse events. No study has compared PRISMA-7 and ER2 risk for short-term adverse events. We hypothesised that ER2 could be a better prognostic tool compared to PRISMA-7 for long length of stay in ED and hospital stay, and hospital admission because it was designed and validated for this specific goal. The study aims to 1) examine and compared PRISMA-7 and ER2 risk for long length of ED and hospital stay and hospital admission, and 2) to establish their performance criteria (i.e., sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratios) for these three short-term adverse events in older ED users.

Inclusion Criteria:

• Being 75 years old and over
• Brought at Emergency on medical stretcher

Exclusion Criteria:

• Being less than 75 years old
• Never come at Emergency

In this study will be enrolled people who are 75 years and over, and who come at Emergency not only for medical reason but also for social.