The Spokane Regional Health District Data Center evaluates County Health Insights data to determine if there are significant changes over time or differences between populations. Those findings are reported for each indicator page. Statistical testing is done using a level of p<0.05, meaning the findings could happen less than 5% of the time due to random variation in events occurring or in people who were included in a sample. This is the standard acceptable level for determining statistical significance. A sample or population and the number of events occurring must be of sufficient size to detect a significant change. With small populations, as happens in rural areas, data is combined to increase the size of the population being evaluated. This is done by combining years of data or having larger groups, such as two age groups instead of four. Even so, it can be challenging to prove statistical significance. Sometimes a difference that is not statistically significant may still be important within a community. Tracking this data allows for discussion, analysis, and data-informed decisions among partners in the counties.