Body weight (g): control 27.23, treated 22.48, Welch t = -5.80, df = 15.8, p < 0.001
Heart weight (mg): control 61.20, treated 53.09, Welch t = -3.87, df = 17.6, p = 0.001
Heart/body weight (mg/g): control 2.25, treated 2.37, Welch t = 2.82, df = 17.3, p = 0.012
Slopes differ between groups? interaction p = 0.091
ANCOVA (log scale): common slope = 0.92 (95% CI 0.65 to 1.19)
Treated vs control at the same body weight: ratio of heart weights 1.037 (95% CI 0.972 to 1.107), t = 1.18, df = 17, p = 0.255