3.4.1. ISI
FIR-pajamas
The FIR-pajamas and sham-pajamas groups showed non-significant improvements at all three time points (FIR pajamas: Cohen’s d for week 2, week 4, and week 6 = 0.271, 0.749, and 0.881; sham pajamas: Cohen’s d for week 2, week 4, and week 6 = 0.598, 1.051, and 0.709; all 