Table 1 Inclusion and exclusion criteria

Inclusion criteria

(1)

Diagnosis of type 1 diabetes for at least 1 year

(2)

Between 18 and 70 years old

(3)

Able to read, speak and write Dutch

(4)

Severely fatigued operationalised as scoring ≥ 35 on the subscale fatigue severity of the CIS (Checklist Individual Strength)

(5)

Fatigued for at least 6 months

Exclusion criteria

(1)

Moderate to severe renal failure operationalised as having a glomerular filtration rate (GFR) ≤ 45

(2)

Blindness or severe visual impairment

(3)

Medical history of congestive heart failure

(4)

Medical history of a stroke in the past five years

(5)

Body mass index (BMI) ≥ 40

(6)

Wheelchair-dependent

(7)

Other concurrent psychiatric or medical comorbidity that could explain the fatigue