Table 3.
Estimated marginal means (standard deviations) on primary and secondary outcomes between posttreatment and 3-month follow-up for the Internet-delivered cognitive behavioral therapy group.
| Measure | Post mean (SD) T3j (n=30) |
3-month follow-up mean (SD) T4k (n=19) |
Within-group t (df) T3, T4 |
r | Within effect sizel (95% CI) T3, T4 |
| PHQ-9a |
10.09 (3.56) | 10.98 (4.49) | −0.91 (27.53) | .68 | −0.21 (−0.78 to 0.37), nsb |
| HbA1cc | 7.84 (1.06) | 7.71 (1.18) | 0.48 (22.06) | .72 | 0.04 (−0.54 to 0.62), ns |
| PAIDd |
35.88 (14.19) | 33.10 (16.17) | 0.87 (22.18) | .76 | 0.17 (−0.41 to 0.74), ns |
| K-10e |
23.69 (4.55) | 23.20 (5.23) | 0.47 (24.55) | .79 | 0.13 (−0.45 to 0.70), ns |
| GAD-7f | 6.75 (2.85) | 7.88 (3.57) | −1.45 (27.89) | .67 | −0.34 (−0.93 to 0.22), ns |
| SF-12 MCSg | 35.37 (7.07) | 37.23 (10.11) | −0.77 (43.39) | .46 | −0.16 (−0.73 to 0.42), ns |
| SF-12 PCSh | 41.12 (7.01) | 41.92 (8.24) | −0.47 (26.26) | .81 | −0.09 (−0.66 to 0.49), ns |
| PHQ-15i | 9.24 (2.79) | 10.10 (3.66) | (22.49) | .86 | −0.26 (−0.84-0.32), ns |
aPHQ-9: patient health questionnaire-9.
bns: not significant (P>.05).
cHbA1c: haemoglobin A1c.
dPAID: problem areas in diabetes.
eK-10: Kessler 10-item psychological distress scale.
fGAD-7: generalized anxiety disorder 7-item scale.
gSF-12 MCS: short form 12-item mental health subscale.
hSF-12 PCS: short form 12-item physical health subscale.
iPHQ-15: patient health questionnaire 15-item somatisation scale.
jT3: posttreatment.
kT4: 3-month follow-up.
lwithin-group ES=Hedges g.