Table 1 Subjective sleep questionnaires at baseline

Clinically significant insomnia (ISI > 10)

(total sample, N = 117)

2 (3.17)¹

n = 63

46 (85.19)

n = 54

x²=80.829

< 0.001***

Clinically significant insomnia (ISI ≥ 15)

(total sample, N = 117)

0 (0)¹

n = 63

22 (40.74)

n = 54

x²=31.611

< 0.001***

Sleep quality disturbances (PSQI > 5)

(total eligible sample, N = 110)

13 (20,97)¹

n = 62

45 (93.75)

n = 48

x²=57.497

< 0.001***

Clinically significant sleepiness (ESS < 10)

(total sample, N = 111)

5 (8.33)¹

N = 60

27 (52.94)

N = 51

x²=26.73

< 0.001***

Pre-sleep arousal scale (PSAS)

(total sample, N = 92)

27.73 (8.44)

N = 41

49.68 (9.81)

N = 51

t(89) = 11.52

< 0.001***

Morning- eveningness

-Definitely evening

0 (0)

3 (5.56)

x²= 5.283

0.259

-Moderately evening

3 (6.98)

9 (16.67)

-Neither

31 (72.09)

33 (61.11)

-Moderately Morning

8 (18.60)

7 (12.96)

-Definitely morning

1 (2.33)

2 (3.70)

(total sample, N = 98)

N = 43

N = 54