Related by context. Frequent words. (Click for all words.) 55 randomized controlled clinical trials 55 meta analyzes 54 randomized controlled trials 54 spinal manipulation 54 CAM therapies 54 calcium supplementation 53 generalizability 52 RCTs 52 lowering LDL cholesterol 52 carotid artery stenting 52 antioxidant supplements 51 randomized trials 51 placebo controlled trials 51 subgroup analyzes 51 postoperative complications 51 vitamin D supplementation 51 randomized clinical trials 51 vertebroplasty 51 nonadherence 51 oophorectomy 50 PSA screening 50 meta analysis 50 sentinel node biopsy 49 atherosclerotic disease 49 carotid endarterectomy 49 endarterectomy 49 antihypertensive drugs 49 observational studies 49 osteoporotic fractures 49 Epidemiological studies 49 cesareans 48 caesarean delivery 48 folic acid supplementation 48 epidemiological studies 48 epidemiologic studies 48 nesiritide 48 IQWiG 48 USPSTF 48 placebo controlled studies 48 cardiac toxicity 48 psychotherapies 48 lipid lowering drugs 47 cardiovascular morbidity 47 kyphoplasty 47 carotid stenting 47 statins 47 oral contraception 47 CABG surgery 47 antiplatelet therapy 47 cardio protective 47 comorbid conditions 47 preterm delivery 47 menopausal hormone therapy 47 estrogen therapy 47 atypicals 47 pharmacological treatments 46 premenopausal breast cancer 46 statin therapy 46 Cochrane Database 46 acute otitis media 46 angiotensin receptor blockers 46 hip fractures 46 folate intake 46 empirical 46 serum cholesterol 46 warfarin therapy 46 aneuploidy 46 platelet activation 46 episiotomy 46 VUR 46 bariatric procedures 46 CMV infection 46 Empirical evidence 45 tonsillectomies 45 efficacy 45 low calorie diets 45 colorectal cancer CRC 45 therapy HRT 45 islet transplantation 45 rheumatic diseases 45 nerve sparing 45 soy isoflavones 45 antibiotic prescribing 45 endovascular repair 45 rofecoxib 45 coronary revascularization 45 urinary symptoms 45 Medicine NEJM 45 mammographic 45 TURP 45 morbidity mortality 45 Systematic Reviews 45 confounding variables 45 ovarian function 45 nonsurgical treatment 45 otitis media 45 ovary removal 45 knee osteoarthritis 45 anticoagulation therapy 45 acamprosate 45 tamoxifen therapy