Table S1. Search strategies used for each database.
| Database | Search strategies |
| PubMed | #1 (red meat[MeSH Terms] OR meat products[MeSH Terms] OR red meat*[Title/Abstract] OR meat product*[Title/Abstract] OR processed meat*[Title/Abstract] OR beef[Title/Abstract] OR pork[Title/Abstract] OR hot dog*[Title/Abstract] OR salami*[Title/Abstract] OR veal[Title/Abstract] OR sausage*[Title/Abstract] OR lamb*[Title/Abstract] OR goat*[Title/Abstract] OR bacon[Title/Abstract] OR mutton[Title/Abstract] OR ham[Title/Abstract] OR luncheon meat*[Title/Abstract] OR pastrami*[Title/Abstract] OR diet pattern[Title/Abstract] OR diet quality[Title/Abstract]) AND (intake*[Title/Abstract] OR consumption*[Title/Abstract] OR diet*[Title/Abstract]) AND (diabetes mellitus[MeSH Terms] OR T2DM[Title/Abstract] OR Type 2 Diabetes[Title/Abstract] OR blood glucose[MeSH Terms] OR fasting glucose[Title/Abstract] OR glycated hemoglobin[Title/Abstract] OR glycemic control[Title/Abstract] OR insulin resistance[MeSH Terms] OR impaired glucose regulation[Title/Abstract] OR impaired fasting glucose[Title/Abstract] OR impaired glucose tolerance[Title/Abstract] OR hyperglycemia[Title/Abstract]) |
| #2 systematic review[Publication Type] OR systematic review[Title/Abstract] OR meta-analysis[Publication Type] OR meta-analysis[Title/Abstract] OR review [Publication Type] OR review [Title/Abstract] OR meta analysis[Title/Abstract] | |
| #1 NOT #2 Filters: Humans | |
| Web of Science | #1 (TS=(red meat*) OR TS=(meat product*) OR TS=(processed meat*) OR TS=(beef) OR TS=(pork) OR TS=(hot dog*) OR TS=(salami*) OR TS=(veal) OR TS=(sausage*) OR TS=(lamb*) OR TS=(goat*) OR TS=(bacon) OR TS=(mutton) OR TS=(ham) OR TS=(luncheon meat*) OR TS=(pastrami*) OR TS=(diet pattern) OR TS=(diet quality)) AND (TS=(intake*) OR TS=(consumption*) OR TS=(diet*)) AND (TS=(diabetes mellitus) OR TS=(T2DM) OR TS=(Type 2 Diabetes) OR TS=(blood glucose) OR TS=(fasting glucose) OR TS=(glycated hemoglobin) OR TS=(glycemic control) OR TS=(insulin resistance) OR TS=(impaired glucose regulation) OR TS=(impaired fasting glucose) OR TS=(impaired glucose tolerance) OR TS=(hyperglycemia)) |
| #2 TS=(systematic review) OR TS=(meta-analysis) OR TS=(review) OR TS=(meta analysis) | |
| #1 NOT #2 | |
| Embase | #1 ('red meat'/exp OR 'processed meat'/exp OR 'smoked meat'/exp OR 'red meat*':ti,ab,kw OR 'meat product*':ti,ab,kw OR 'processed meat*':ti,ab,kw OR beef:ti,ab,kw OR pork:ti,ab,kw OR 'hot dog*':ti,ab,kw OR salami*:ti,ab,kw OR veal:ti,ab,kw OR sausage*:ti,ab,kw OR lamb*:ti,ab,kw OR goat*:ti,ab,kw OR bacon:ti,ab,kw OR mutton:ti,ab,kw OR ham:ti,ab,kw OR 'luncheon meat*':ti,ab,kw OR pastrami*:ti,ab,kw OR 'diet pattern':ti,ab,kw OR 'diet quality':ti,ab,kw) AND (intake*:ti,ab,kw OR consumption*:ti,ab,kw OR diet*:ti,ab,kw) AND ('diabetes mellitus'/exp OR T2DM: ti,ab,kw OR 'Type 2 Diabetes':ti,ab,kw OR 'glucose blood level'/exp OR 'fasting glucose':ti,ab,kw OR 'glycated hemoglobin':ti,ab,kw OR 'glycemic control':ti,ab,kw OR 'insulin resistance'/exp OR 'impaired glucose regulation':ti,ab,kw OR 'impaired fasting glucose':ti,ab,kw OR 'impaired glucose tolerance':ti,ab,kw OR hyperglycemia:ti,ab,kw) |
| #2 'systematic review'/exp OR 'systematic review':ti,ab,kw OR 'meta analysis'/exp OR meta-analysis:ti,ab,kw OR 'review'/exp OR review:ti,ab,kw OR 'meta analysis':ti,ab,kw | |
| #1 NOT #2 | |
| Cochrane | #1 (red meat* or meat product* or processed meat* or beef or pork or hot dog* or salami* or veal or sausage* or lamb* or goat* or bacon or mutton or ham or luncheon meat* or pastrami* or diet pattern or diet quality):ti,ab,kw |
| #2 MeSH descriptor: [Red Meat] explode all trees | |
| #3 MeSH descriptor: [Meat Products] explode all trees | |
| #4 (intake* or consumption* or diet*):ti,ab,kw | |
| #5 (#1 or #2 or #3) and #4 | |
| #6 MeSH descriptor: [Diabetes Mellitus] explode all trees | |
| #7 MeSH descriptor: [Insulin Resistance] explode all trees | |
| #8 (T2DM or Type 2 Diabetes or blood glucose or fasting glucose or glycated hemoglobin or glycemic control or impaired glucose regulation or impaired fasting glucose or impaired glucose tolerance or hyperglycemia):ti,ab,kw | |
| #9 #5 and (#6 or #7 or #8) | |
| #10 MeSH descriptor: [Systematic Review] explode all trees | |
| #11 MeSH descriptor: [Meta-Analysis] explode all trees | |
| #12 MeSH descriptor: [Review] explode all trees | |
| #13 (systematic review or meta-analysis or meta analysis or review):ti,ab,kw | |
| #14 #9 not (#10 or #11 or #12 or #13) |