Health related quality of life for young people receiving dialectical behaviour therapy (DBT): a routine outcome-monitoring pilot

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Table 1 Comparison of EQ-5D scores across studies

Sample	EQ-5D at t1 Mean (95 % confidence intervals)	EQ-5D at t2 Mean (95 % confidence intervals)	t2 − t1 (mean length of treatment)	Average difference	Effect size d
Present study: n = 43 routine admissions to DBT programmes	0.23 (0.12–0.34) EQ-5D < 0 33 %^a	0.55 (0.44–0.67) EQ-5D < 0 21 %^a	10 months	0.32 (0.20–0.44) p < 0.001	1.00
RCTs in adults
Nadort et al. (2009) n = 62 SFT versus modified SFT for adult BPD	0.44 (0.31–0.56)	0.56 (0.47–0.65)	18 months	0.12 (0.02–0.22) p = 0.02	0.39^b
van Asselt et al. (2008) n = 48 transference versus SFT for adult BPD	0.50 (0.41–0.59)	0.69 (0.61–0.77)	3 years	0.20 (0.09–0.29) p < 0.001	0.64
RCTs in CAMHS
Byford (2013) n = 199 CBT/SSRI versus SSRI for adolescent depression	0.50 (0.46–0.54) EQ-5D < 0 5.5 %	0.76 (0.72–0.80) EQ-5D < 0 1.5 %	28 weeks	0.26 (not reported)	0.90

^aIncludes 9 clients (21 %) admitted in state 11233 whose utility remained unchanged at −0.008
^bRelative to baseline variance which is the effect size commonly used in power calculations, Nadort et al. (2009) calculate effect sizes relative to pooled variance (pre/post) and report a lower estimate of 0.35