Laparoscopic Janeway gastrostomy as preferred enteral access in specific patient populations: A systematic review and case series

Table 1 2010 American association of clinical endocrinologists protocol for production of clinical practices guidelines - evidence rating

Numerical descriptor (evidence level)	Semantic descriptor (reference methodology)
1	Meta-analysis of randomized controlled trials
1	Randomized controlled trial
2	Meta-analysis of nonrandomized prospective or case-controlled trials
2	Nonrandomized controlled trial
2	Prospective cohort study
2	Retrospective case-control study/Retrospective cohort study
3	Cross-sectional study
3	Surveillance study (registries, surveys, epidemiologic study)
3	Consecutive case series
3	Single case reports
4	No evidence (theory, opinion, consensus, or review)

1 = strong evidence; 2 = intermediate evidence; 3 = weak evidence; 4 = no evidence. CCS: Consecutive case series; CSS: Cross-sectional study; MRCT: Meta-analysis of randomized controlled trials; MNRCT: Meta-analysis of nonrandomized prospective or case-controlled trials; NRCT: Nonrandomized controlled trial; NE: No evidence; PCS: Prospective cohort study; RCCS: Retrospective case-control study; RCS: Retrospective cohort study; RCT: Randomized controlled trial; SS: Surveillance study; SCR: Single case reports.