Symptom frequency
The ANCOVA indicated significantly greater symptom improvement in the
OLP group (adj. M = 1.89; SE = 0.11) than in the TAU group
(adj. M = 2.29; SE = 0.10), F (1, 71) = 7.272,p = .009, ɳ²p = .093, as highlighted in Figure 3b
and Table 2. This reflects a medium to large effect (f = .320).
The effect of symptom frequency at baseline was also significant,F (1, 71) = 22.844, p < .001, ɳ²p= .243. Differences between OLP and TAU in the frequency of specific
symptom clusters are displayed in Figure 4 (and presented in detail in
the supplement), suggesting that the effects of OLP as compared to TAU
were particularly pronounced for eye-related symptoms, breathing-related
symptoms, and general symptoms.
Insert Table 2 here.