Fig. 4From: Swimmer’s itch in Canada: a look at the past and a survey of the present to plan for the futureRates of Swimmer’s Itch Cases Over Time. Least-square means of swimmer’s itch case counts over five months in each year for four years (2014–2017). Boxes indicate the least-square means of the rate. Error bars indicate the 95% confidence intervals around the rate. Rates sharing a letter are not significantly different (Tukey-adjusted comparisons)Back to article page