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. Author manuscript; available in PMC: 2013 Jul 25.
Published in final edited form as: Arch Gen Psychiatry. 2009 Jul;66(7):692–698. doi: 10.1001/archgenpsychiatry.2009.66

Figure 2.

Figure 2

ISI Scores at Pre-, Post-, and Six Month Follow-Up

A significant Group X Time interaction effect showed a marked improvement from pre- to post-assessment in the Internet intervention group, and little change in the control group, F (1, 42) = 29.64, p<.001. The Internet group maintained their gains at 6 month follow-up (no significant change in ISI scores). Error bars indicate 95% confidence intervals.