Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

333 questions · 350 findings · 60 reviews

No studies found 120 · 34.3%GRADE not reported 17 · 4.9%Very low 97 · 27.7%Low 81 · 23.1%Moderate 25 · 7.1%High 10 · 2.9%

Intervention not reported

Change in fat mass (%); change in fat free mass (%) · women with need for contraception

The intervention may leads to higher change in fat mass (%); change in fat free mass (%) (low certainty).

1 finding from 1 review

Intervention not reported

Change in fat mass (%); change in fat free mass (%) · perimenopausal women with need for contraception

The intervention may leads to higher change in fat mass (%); change in fat free mass (%) (low certainty).

1 finding from 1 review

Intervention not reported

Change in measures of nutritional status: weight (kg), body mass index (kg/ m2), and waist/ hip ratio (cms) · participants with schizophrenia

The review found no eligible studies for this question.

1 finding from 1 review

Methotrexate vs placebo

Change in muscle mass at 6 months (%) ‐ not measured · people with inclusion body myositis

The review found no eligible studies for this question.

1 finding from 1 review

IVIg vs placebo

Change in muscle mass at 6 months (%) ‐ not measured · people with inclusion body myositis

The review found no eligible studies for this question.

1 finding from 1 review

Higher circulating 25-hydroxyvitamin D (25(OH)D) concentration vs Lower circulating 25-hydroxyvitamin D (25(OH)D) concentration

Body‐mass index (BMI) · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Body mass index: Z score -0.15 (95% CI -0.19 to -0.11), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Dietary counselling tailored to a Stage of Change (Transtheoretical Model) to increase fruit and vegetable intake (two counselling sessions) vs usual care

Body‐mass index (BMI) · Edentulous patients aged 45 to 80 years attending dental-student teaching clinics for replacement dentures, Newcastle Dental Hospital, UK
1 finding from 1 review