Table 4. Average times group 1a and group 1b were logged in to the web-application.

Group comparisons	Results	P-value
1 (eBook) vs 1 (eCase) [times]	1.6 (1.3–1.9) vs 2.8 (2.4–3.1)	<0.001

Times logged in, 95% confidence interval in brackets. Mann-Whitney U-test for comparisons. N = 21 in each group.