Skip to main content

Table 3 Quality of the evidence and strength of recommendations for human clinical trials 1

From: The effects of exercise on cognition in Parkinson’s disease: a systematic review

Study Can exercise improve a marker of cognitive function? Quality of evidence 2 Strength of recommendation 3
Studies that specifically measured executive function (n = 4)
McKee et al. 2013 [29] Yes Moderate Strong
Cruise et al. 2011 [26] Yes Moderate Strong
Ridgel et al. 2011 [28] Yes Moderate Strong
Tanaka et al. 2009 [27] Yes Moderate Strong
Studies that measured unspecified aspects of cognition (n = 4)
Dos Santos Mendes et al. 2012 [25] Yes Low Weak
Pompeu et al. 2012 [24] Yes Low Weak
Müller et al. 2010 [23] Yes Low Weak
Baatile et al. 2000 [22] Yes Low Weak
  1. 1Quality of evidence and strength of recommendations based on the Grades of Recommendations, Assessment, Development, and Evaluation (GRADE) ranking system [32, 33].
  2. 2The GRADE system offers four levels of evidence: high, moderate, low and very low.
  3. 3The GRADE system offers three levels for the strength of a recommendation: strong, weak, or no recommendation.