3.3. Primary Outcome
FIR-pajamas
The FIR-pajamas and sham-pajamas groups showed non-significant improvements in PSQI scores at all three time points (FIR pajamas: Cohen’s d for week 2, week 4, and week 6 = 0.15, 0.364, and 0.356; sham pajamas: Cohen’s d for week 2, week 4, and week 6 = 0.655, 0.78, and 0.754; all 