Table 3

Sleep timing measures, interactions between groups

Pre to Post

Pre to Fu3

BTS v/s WL

BTS v/s BT

BT v/s WL

BTS v/s WL

BTS v/s BT

BT v/s WL

p

Effect size (ηp2)a

p

Effect size (ηp2)

p

Effect size (ηp2)

p

Effect size (ηp2)

p

Effect size (ηp2)

p

Effect size (ηp2)


SOL

< .001

0.21

.06

0.04

.01

0.08

.003

0.10

.64

0.00

.02

0.07

WASO

< .001

0.20

.005

0.09

.11

0.03

.04

0.05

.23

0.02

.35

0.01

TST

.09

0.03

.92

0.00

.06

0.04

.01

0.07

.34

0.01

.04

0.05

SE

< .001

0.33

< .001

0.19

.004

0.09

< .001

0.19

.02

0.06

.004

0.09


Abbreviations: Pre, Pre-treatment assessment; Post, Post-treatment assessment; Fu3, 3-month follow-up assessment; BTS, Bibliotherapy with support; WL, Waiting list control group; BT, Bibliotherapy; SOL, Sleep Onset Latency; WASO, Wake After Sleep Onset; TST, Total Sleep Time; SE, Sleep Efficiency

a ηp2 (Eta 2) is interpreted as explained variance in the sample

Jernelöv et al. BMC Psychiatry 2012 12:5   doi:10.1186/1471-244X-12-5

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