Table 2 Descriptive statistics for outcome measures and summary statistics

Demographics

Age, y

39.52 (11.85)

43.74 (11.11)

t(49.01) = 1.32, p=0.192

Sex, No. (%)

X² = 0.42, p=0.515

 Women

22 (88.00)

22 (81.48)

 Men

3 (12.00)

5 (18.52)

Ethnicity, No. (%)

X² = 3.11, p=0.375

 White

23 (92.00)

26 (96.30)

 Black

1 (4.00)

0 (0.00)

 Asian

0 (0.00)

1 (3.70)

 Mixed

1 (4.00)

0 (0.00)

Relationship status, No. (%)

X² = 4.62, p=0.328

 Married

11 (44.00)

14 (51.85)

 Co-habiting

5 (20.00)

7 (25.93)

 Separated

0 (0.00)

2 (7.41)

 Single

6 (24.00)

3 (11.11)

 Other

3 (12.00)

1 (3.70)

Hours of work

36.92 (5.71)

34.22 (7.73)

t(47.74) = -1.33, p=0.157

Education level, No. (%)

X² = 5.93, p=0.313

 Doctorate

1 (4.00)

2 (7.41)

 Masters

6 (24.00)

6 (22.22)

 Bachelor

14 (56.00)

10 (37.04)

 Secondary school

3 (12.00)

2 (7.41)

 Some diploma

0 (0.00)

3 (11.11)

 Other qualification

1 (4.00)

4 (14.81)

Income No. (%)

X² = 5.92, p=0.315

 £10,000-£29,999

8 (32.00)

3 (11.11)

 £30,000-£49,999

8 (32.00)

8 (29.63)

 £50,000-£69,999

4 (16.00)

5 (18.52)

 £70,000-£89,999

2 (8.00)

8 (29.63)

 £90,000-£109,999

2 (8.00)

2 (7.41)

 £110,000-£149,999

1 (4.00)

1 (3.70)

Secondary outcomes

 Insomnia (ISI)

7.92 (3.34)

6.96 (3.58)

t(50.00) = -1.00, p=0.323

 Depression (PHQ-9)

8.32 (4.21)

8.44 (3.67)

t(47.82) = 0.11, p=0.91

 Anxiety (GAD-7)

8.28 (4.88)

9.30 (3.93)

U = 273.00, p=0.236

Work productivity (WPAI)

 WPAI-WTM

0.65 (1.82)

0.73^a (3.49)

U = 339.00, p=0.609

 WPAI-IWW

30.40 (21.31)

31.85 (26.17)

U = 342.50, p=0.926

 WPAI-OWI

30.92 (21.09)

31.04^a (25.17)

U = 334.50, p=0.857

 WPAI-AI

32.80 (21.89)

37.78 (26.65)

U = 301.00, p=0.500

Job satisfaction (IJSS)

2.83^b (0.32)

2.98^c (0.41)

t(20.97) = 1.05, p=0.307

 Well-being (WEMWBS)

41.60 (7.71)

39.96 (7.51)

t(49.45) = -0.77. p=0.442

 Quality of life (EQ-5D-5L)

 EQ-5D-5L: Overall health score

71.40 (19.17)

73.70 (14.95)

U = 308.000, p=0.588