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Table 1 Measures and instrumentation

From: Protocol of a mixed method, randomized controlled study to assess the efficacy of a psychosocial intervention to reduce fatigue in patients with End-Stage Renal Disease (ESRD)

  Instrumentation T0 T1 T2 T3
Primary outcome measures      
 Fatigue severity Checklist Individual Strength (CIS-fatigue) [43] x x x x
Secondary outcome measures      
 Quality of life Kidney Disease and Quality of Life Short Form (KDQOL-SF) [48] x x x x
Mediating/moderating variables      
 Social support Social Support Inventory (SSL-I + SSL-D) [58] + subscale Utrechtse Coping Lijst (UCL) [59] x x x x
 Illness cognitions Illness Cognition Questionnaire (ICQ) [60] x x x x
 Illness perceptions Illness Perception Questionnaire (IPQ-R) [61]: subscale emotional representation x x x x
 Coping Cognitive Emotion Regulation Questionnaire (CERQ) [62] x x x x
 Catastrophizing thoughts Fatigue Catastrophizing Scale (J-FCS) [63, 64] x x x x
 Mastery Mastery Scale [65] x x x x
 Depression Patient Health Questionnaire: Depression (PHQ-9) [66] x x   
General effect modifiers      
 Demographic variables Self-report: age, gender, education, ethnicity, social status, employment x    
 Medical history and comorbidity Self-report: treatment, treatment frequency, transplantability x    
 Medical parameters Medical records: sleep medication, Epo, Hb, Urea, Creatinine, Protein, Albumin, CRP, weight, height x    x