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Table 1 Methodological quality assessment tool and quality score of the included studies (n = 18)

From: Determinants of exercise adherence and maintenance among cancer survivors: a systematic review

   Exercise intervention adherence Exercise maintenance after completion of an intervention  
   Pre During     After      During/after        
Items/reference   [39] [40] [42] [43] [41] [45] [47] [44] [46] [48] [49] [50] [56] [53] [52] [51] [55] [54] Score (%)
Study population and participation Topic                    
A. Description of cancer type, stage and treatment I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 100
B. Description of inclusion and exclusion criteria I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 100
C. Positive if the participation rate at baseline was at least 80%, or if the non-response was not selectivea V/P 0 0 0 0 0 0 0 0 0 0 1 0 ? 0 0 1 0 0 16
Study attrition                     
D. Number of patients included in the analysis ≥100 V 0 1 0 0 0 0 1 0 0 0 0 0 1 1 1 0 0 0 26
E. Positive if the response at first follow-up was at least 80%, or if the non-response at first follow-up was not selectiveb V/P 0 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 0 80
Data collection                     
F. Positive if determinants of adherence were measured with a reliable toolc V/P 0.5 0.7 0.5 0.6 0.6 0.8 0.6 0.8 0.7 0.7 0.5 0.8 0.7 0.8 0.7 0.4 0.5 0.7 63
G. Positive if determinants of adherence were measured with a valid toold V/P 0.2 0.5 0.5 0.2 0.6 0.5 0.6 0.8 0.6 0.6 0.2 0.6 0.7 0.6 0.4 0 0 0 40
H. Adherence was measured by an objective toole V/P 1 1 0 1 1 1 0 0 0 0 0 1 0 0 0 0 1 0 37
Data analysis                     
I. Multivariate analysis techniques was used. V/P 0 1 1 1 0 1 1 1 1 0 1 1 1 1 1 0 0 1 38
J. Results were presented as point estimates (mean differences/Beta’s/correlation coefficients) and measures of variability (SD, standard error or CI) I 1 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 1 37
K. Positive if number of samples is at least 10 times the number of independent variables V/P 0 1 1 0 0 1 1 1 0 0 1 0 1 1 0 0 0 0 42
Total quality score (%) f   22 78 51 47 28 67 64 57 54 29 59 55 68 55 52 43 31 21  
  1. 1, study provided information on the quality item and met the criterion; 0, study provided information on the quality item but did not meet the criterion; ?,study provided no or insufficient information on the quality item.
  2. I: informativeness; V: validity/P: precision. aattrition analyses were performed and results showed no significant differences between baseline study sample and population of eligible subjects; battrition analyses were performed and results showed no significant differences between dropouts and follow‒up participants; cassociated factors showed internal consistency of Cronbach's alpha ≥0.70 or test‒retest correlations of ≥0.80 or κ/ICC ≥0.70. For clinical factors a standardized protocol was followed by trained researchers; dassociated factors showed correlations of ≥0.80 or κ/ICC ≥0.70 with similar constructs. For physical variables (i.e., past physical activity and past sedentary behavior) an objective measurement instrument (i.e., accelerometer/pedometer) was used. For clinical variables a standardized protocol was followed by trained researchers; eFor walking interventions: adherence or maintenance was measured by accelerometer or pedometer read out by the researcher. For supervised exercise : the trainer reported presence of the participant; fthe number of items scored positively on the validity/precision (V/P) criteria divided by the total number of validity/precision criteria (i.e. 8).