Relationship between the physical environment and different domains of physical activity in European adults: a systematic review

Table 1 Criteria for summary coding of the evidence

Percentages of records supporting association¹	Summary code²	Description
0-39% associated	0	Evidence unrelated
40-50% associated in one direction and ≥25% in the opposite	0	Evidence unrelated
40-50% associated in one direction and < 25% in the opposite	(+);(−)	Possible evidence for a positive/negative relationship
51-100% associated in one direction and ≥25% in the opposite	(+);(−)	Possible evidence for a positive/negative relationship
51-100% associated in one direction and < 25% in the opposite	+; -	Convincing evidence for a positive/negative relationship

¹ Only valid when relationship was investigated in at least three independent samples, otherwise evidence was regarded "not applicable" (coded N/A).
² Double signed summary codes are applied when convincing positive “++”, convincing negative “--”, possible positive “(++)”, possible negative “(−−)” or no “00” associations were present in at least four independent samples.

ISSN: 1471-2458