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. 2013 Oct 10;15(10):e191. doi: 10.2196/jmir.2511

Table 4.

Multilevel results for interactions between pretreatment participant characteristics (trichotomous moderator variables), intervention condition, and change in psychopathological symptom severity (dummy coded) for the intention-to-treat sample (N=400) using full maximum likelihood estimation.

Interaction terms Education levela Diagnosesb Years since onsetc

B SE P B SE P B SE P
Interceptd 0.88 0.07 <.001 0.87 0.06 <.001 0.88 0.09 <.001
Moderator dummy 1 –0.16 0.10 .11 0.44 0.16 .005 –0.04 0.11 .687
Moderator dummy 2 0.08 0.14 .55 –0.34 0.12 .004 –0.13 0.13 .313
T1-T2e 0.63 0.07 <.001 0.73 0.06 <.001 0.64 0.09 <.001
T2-T3f 0.17 0.06 .005 0.16 0.05 .002 0.10 0.08 .18
T2-T4g 0.22 0.08 .004 0.36 0.06 <.001 0.31 0.10 .002
Conditionh –0.14 0.10 .17 –0.02 0.08 .82 –0.28 0.13 .02
Condition×T1-T2 0.03 0.09 .76 –0.02 0.08 .85 0.09 0.12 .43
Condition×T2-T3 –0.17 0.08 .04 –0.21 0.07 .004 –0.20 0.10 .06
Condition×T2-T4 –0.25 0.11 .03 –0.38 0.09 <.001 –0.33 0.14 .02
Moderator dummy 1×T1-T2 0.03 0.09 .72 –0.04 0.15 .80 –0.04 0.11 .70
Moderator dummy 1×T2-T3 –0.04 0.08 .64 0.02 0.15 .89 0.04 0.09 .68
Moderator dummy 1×T2-T4 0.07 0.11 .48 0.01 0.19 .96 –0.03 0.12 .80
Moderator dummy 2×T1-T2 0.17 0.13 .17 –0.09 0.11 .40 0.20 0.12 .10
Moderator dummy 2×T2-T3 0.10 0.11 .35 0.03 0.10 .75 0.14 0.11 .19
Moderator dummy 2×T2-T4 0.35 0.14 .02 –0.19 0.13 .14 0.02 0.14 .88
Cond×mod×dummy 1i 0.22 0.14 .11 –0.07 0.22 .74 0.36 0.15 .02
Cond×mod×dummy 2i 0.19 0.20 .34 0.08 0.16 .63 0.27 0.18 .13
Cond×mod×dummy 1×T1-T2i –0.03 0.13 .82 –0.07 0.22 .75 –0.07 0.15 .63
Cond×mod×dummy 1×T2-T3i –0.08 0.11 .50 –0.43 0.21 .04 –0.03 0.13 .82
Cond×mod×dummy 1×T2-T4i –0.12 0.15 .42 –0.24 0.26 .37 0.01 0.17 .93
Cond×mod×dummy 2×T1-T2i 0.05 0.18 .77 0.10 0.15 .52 –0.14 0.17 .43
Cond×mod×dummy 2×T2-T3i –0.32 0.16 .049 –0.03 0.14 .83 –0.09 0.15 .56
Cond×mod×dummy 2×T2-T4i –0.42 0.21 .049 0.15 0.18 .41 0.03 0.19 .89

aEducation level dummy 1 (0=high education level; 1=medium education level), education level dummy 2 (0=high education level; 1=low education level).

bDiagnoses dummy 1 (0=mood disorder; 1=anxiety disorder), diagnoses dummy 2 (0=mood disorder; 1=adjustment disorder).

cYears since onset: years since disorder onset dummy 1 (0=1-5 years; 1=>5 years), years since disorder onset dummy 2 (0=1-5 years; 1=<1 year).

dIntercept: general psychopathological symptom severity in control at baseline (T2).

eT1-T2: dummy-coded change in general psychopathological symptom severity from T1 to T2.

fT2-T3: dummy-coded change in general psychopathological symptom severity from T2 to T3.

gT2-T4: dummy-coded change in general psychopathological symptom severity from T2 to T4.

hCondition (0=control; 1=intervention).

iCond × mod × dummy: condition × moderator × dummy.