Table 2: Absenteeism counts before and after the winter, spring, and pseudo-breaks over 5 academic years for influenza-like illness (ILI)-associated absenteeism (a-ILI) and the complement of this number (all other students in attendance or absent for other reasons). Odds ratios (OR) comparing after break to before break counts calculated using the Mantel-Haenszel test are provided along with 95% confidence intervals (CI).