Table 4: Differences between study groups in Pittsburgh sleep quality index at 6 months and 1 year after treatment.

6 months (n = number of patients)P1 year (n = number of patients)P
IGPG2 -PTIGPG3 -PT
PSQINPMPSPNPMPSPNPMPSPNPMPSP

PSQ5132571816.0934112861916.054
SL4182121425.1052182331424.132
SD216253731.039*117252633.040*
HSE4192001427.047*2202101328.044*
SDI0212241126.045*0192421326.088
DD6211602417.2403182212812.039*

Values are shown as n = number of patients with no problems, moderate problems, severe problems. PSQI, Pittsburgh sleep quality index; IG, intervention group; PG, placebo group; Pre-T, pre-therapy; 2 PT, post-therapy at 6 months after end of treatment; 3 PT, post-therapy at 1 year after end of treatment; PSQ, Pittsburgh subjective quality; SL, sleep latency; SD, sleep duration; HSE, habitual sleep efficiency; SDI, sleep disturbance; DD, daily dysfunction; NP, does not present problems; MP, moderate problems; SP, severe problems. *P = .05 (95% CI).