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. 2009 Jan 21;2009(1):CD006691. doi: 10.1002/14651858.CD006691.pub2
Search terms
Unless otherwise stated, search terms were free text terms; exp = exploded MeSH: Medical Subject Heading (Medline medical index term); the dollar sign ($) stands for any character(s); the question mark (?) = substitute for one or no characters; ab = abstract; ti = titel; ot = original titel; pt = publication type; sh = MeSH: Medical subject heading (MEDLINE medical index term); adj = adjacency. 
 
 I. Metformin: 
 1.exp Biguanides/ 
 2.(metformin$ or glucophag$ or biguanid$).ab,ti,ot. 
 3.1 or 2 
 
 II. Insulin therapy: 
 4.Insulin/ad, aa, tu, th [Administration & Dosage, Analogs & Derivatives, Therapeutic Use, Therapy] 
 5.(insulin$ adj6 (therap$ or treatment$ or intervention$)).ab,ti,ot. 
 6.4 or 5 
 
 III. Diabetes mellitus: 
 7.exp diabetes mellitus/ 
 8.diabet$.ab,ti,ot. 
 9.(IDDM or NIDDM or MODY or T1DM or T2DM).ab,ti,ot. 
 10.((typ$ 1 or typ$ 2) and diabet$).ab,ti,ot. 
 11.((typ$ I or typ$ II) and diabet$).ab,ti,ot. 
 12.insulin$ secret$ dysfunc$.ab,ti,ot. 
 13.impaired glucose toleran$.ab,ti,ot. 
 14.exp Glucose Intolerance/ 
 15.glucose intoleran$.ab,ti,ot. 
 16.exp Insulin Resistance/ 
 17.insulin$ resist$.ab,ti,ot. 
 18.(non insulin$ depend$ or noninsulin$ depend$ or non insulin?depend$ or 
 noninsulin?depend$).ab,ti,ot. 
 19.(insulin$ depend$ or insulin?depend$).ab,ti,ot. 
 20.metabolic$ syndrom$.ab,ti,ot. 
 21.(pluri metabolic$ syndrom$ or plurimetabolic$ syndrom$).ab,ti,ot. 
 22.(late onset adj diabet$).ab,ti,ot. 
 23.(maturity onset adj diabet$).ab,ti,ot. 
 24.(juvenile adj diabet$).ab,ti,ot. 
 25.(syndrome X and diabet$).ab,ti,ot. 
 26.hyperinsulin$.ab,ti,ot. 
 27.insulin sensitiv$.ab,ti,ot. 
 28.or/7‐27 
 29.exp diabetes insipidus/ 
 30.diabet$ insipidus.ab,ti,ot. 
 31.29 or 30 
 32.28 not 31 
 
 IV. RCT/CCT (sensitive search): 
 Part 1: 
 33.randomized controlled trial.pt. 
 34.controlled clinical trial.pt. 
 35.randomized controlled trials.sh. 
 36.random allocation.sh. 
 37.double‐blind method.sh. 
 38.single‐blind method.sh. 
 39.or/33‐38 
 Part 2: 
 40.clinical trial.pt. 
 41.exp clinical trials/ 
 42.(clinic$ adj25 trial$).ab,ti,ot. 
 43.((singl$ or doubl$ or trebl$ or tripl$) adj (mask$ or blind$)).ab,ti,ot. 
 44.placebos.sh. 
 45.placebo$.ab,ti,ot. 
 46.random$.ab,ti,ot. 
 47.research design.sh. 
 48.(latin adj square).ab,ti,ot. 
 49.or/40‐48 
 Part 3: 
 50.comparative study.pt. 
 51.exp evaluation studies/ 
 52.follow‐up studies.sh. 
 53.prospective studies.sh. 
 54.(control$ or prospectiv$ or volunteer$).ab,ti,ot. 
 55.cross‐over studies.sh. 
 56.or/50‐55 
 57.39 or 49 or 56 
 
 V. Meta‐analysis: 
 58.exp meta‐analysis/ 
 59.exp Review Literature/ 
 60.meta‐analysis.pt. 
 61.review.pt. 
 62.or/58‐61 
 63.letter.pt. 
 64.comment.pt. 
 65.editorial.pt. 
 66.historical‐article.pt. 
 67.or/63‐66 
 68.62 not 67 
 69.((systematic$ or quantitativ$ or methodologic$) adj (review$ or overview$)).ab,ti,ot. 
 70.meta?anal$.ab,ti,ot. 
 71.(integrativ$ research review$ or research integration$).ab,ti,ot. 
 72.quantitativ$ synthes$.ab,ti,ot. 
 73.(pooling$ or pooled analys$ or mantel$ haenszel$).ab,ti,ot. 
 74.(peto$ or der?simonian$ or fixed effect$ or random effect$).ab,ti,ot. 
 75.or/69‐74 
 76.68 or 75 
 
 VI. HTA: 
 77.exp Technology Assessment, Biomedical/ 
 78.HTA.ab,ti,ot. 
 79.(health technology adj6 assessment$).ab,ti,ot. 
 80.(biomedical adj6 technology assessment$).ab,ti,ot. 
 81.or/77‐80 
 
 VII. Metformin + Insulin + Diabetes mellitus: 
 82.3 and 6 and 32 
 
 VIII. RCT/CCT + Meta‐analysis + HTA: 
 83.57 or 76 or 81 
 
 IX. VII + VIII: 
 84.82 and 83 
 
 X. Polycystic ovary syndrome (excluded): 
 85.exp Polycystic Ovary Syndrome/ 
 86.84 not 85 
 
 XI. Adolescent: 
 87.exp Adolescent/ 
 88.exp Puberty/ 
 89.(adolescent$ or pubert$).ab,ti,ot. 
 90.or/87‐89 
 
 91. 86 and 90 
 92. limit 91 to animal 
 93. limit 91 to human 
 94. 92 not 93 
 95. 91 not 94