Table 2 Time points of all measures

Main outcome measures

Fatigue severity

Checklist Individual Strength (CIS, subscale fatigue) [19]

X

X

X

X

Secondary outcome measures

Limitations in daily functioning

Sickness Impact Profile 8 (SIP8, total score) [23]

X

X

X

X

Diabetes regulation

HbA_1c; blood glucose variability [33]

X

X

X

X

Indicators for modules

Sleep problems

Sickness Impact Profile 8 (SIP8, subscale sleep) [23]

X

X

Dysfunctional cognitions with respect to fatigue

Self Efficacy Scale (SES) [24]

X

X

Fatigue Catastrophising Scale (FCS) [25]

X

X

Illness Management Questionnaire (IMQ) [26]

X

X

Level of physical activity

Actometer [27]

X

X

Pain severity and impact of pain

SF36 Questionnaire (subscale pain) [28]

X

X

Pain Catastrophising Scale (PCS) [29]

X

X

Cognitions with respect to social support and social interactions

Sonderen Social Support Inventory (SSI) [30]

X

X

Diabetes-related distress

Problem Areas in Diabetes (PAID) [31]

X

X

Other measures

Depression

Beck Depression Inventory (BDI) [20]

X

X

Psychological distress

SCL90 [21]

X

Cognitions regarding fatigue

Fatigue Quality List (FQL) [39]

X

X

Cognitions with respect to activity

Tampa Scale for Kinesiophobia 2 (TSK2) [40]

X

X

Affective quality of pain

McGill Pain Questionnaire (MPQ) [41]

X

X

Causal attributions

CAL diabetes [42]

X

X

Diabetes quality of life

Diabetes Quality of Life Brief Clinical Inventory (DQOL_BCI) [43]

X

X

Cognitions regarding symptoms of chronic illness

Illness Cognition Questionnaire (ICQ) [44]

X

X

Cognitive and Behavioural Responses to Symptoms Questionnaire (CBRSQ) [45]

X

X

Self-efficacy regarding diabetes self-care

Confidence in Diabetes Self-Care Scale (CIDS) [46]

X

X

Physical activity

International Physical Activity Questionnaire (IPAQ) [47]

X

X