Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,297 questions · 3,638 findings · 215 reviews · Oral Health

No studies found 98 · 2.7%GRADE not reported 2,946 · 81%Very low 263 · 7.2%Low 158 · 4.3%Moderate 137 · 3.8%High 36 · 1%

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

Head circumference (mm) · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Head circumference: WMD 0.05 (95% CI -0.24 to 0.34), not statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Vitamin D vs placebo or control

Diastolic blood pressure · Adults (general population)

Meta-analysis of randomised trials of vitamin D supplementation for Diastolic blood pressure: WMD -0.03 (95% CI -1.98 to 1.92), not statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Vitamin D vs placebo or control

Gestational age at birth (weeks) · pregnant women

Meta-analysis of randomised trials of vitamin D supplementation for Mean gestational age at delivery: WMD 0.17 (95% CI -0.16 to 0.51), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Surgical anchorage (mini-screw or mid-palatal implant) vs Conventional anchorage (headgear, transpalatal/palatal arch, etc.)

Mesiodistal movement of the upper first permanent molar · Patients of any age undergoing orthodontic treatment with fixed appliances and requiring anchorage (adolescents to adults up to 48-54 years)

Surgical anchorage (mini-screw or mid-palatal implant) probably leads to lower mesiodistal movement of the upper first permanent molar compared with conventional anchorage (headgear, transpalatal/palatal arch, etc.) (moderate certainty).

1 finding from 1 review

Surgical anchorage (mini-screw or mid-palatal implant) vs Conventional anchorage (headgear, transpalatal/palatal arch, etc.)

Success or failure of the anchorage device · Patients of any age undergoing orthodontic treatment with fixed appliances and requiring anchorage (adolescents to adults up to 48-54 years)
1 finding from 1 review

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

Pancreatic cancer · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Pancreatic cancer: OR 2.13 (95% CI 1.02 to 4.47), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

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

Hip Fracture · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Hip fracture (Population-based controls): log ratio of geometric mean -0.51 (95% CI -0.64 to -0.38), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

2 findings from 1 review

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

Non-Hodgkin's lymphoma · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Non-Hodgkin's lymphoma (Females): OR 0.81 (95% CI 0.39 to 1.70), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

2 findings from 1 review

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

Hypertension · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Hypertension: RR 0.70 (95% CI 0.58 to 0.86), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

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

Aggressive prostate cancer · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Aggressive prostate cancer: OR 0.98 (95% CI 0.84 to 1.15), not statistically significant. Umbrella review outcome-level evidence grade: Substantial effect unlikely.

1 finding from 1 review

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

Cardiovascular mortality · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Cardiovascular disease mortality: RR 0.55 (95% CI 0.36 to 0.85), statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

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

Birth length · pregnant women and their infants..

Meta-analysis of observational studies (higher vs lower maternal 25(OH)D) for Birth length: WMD 0.19 (95% CI -0.26 to 0.65), not statistically significant. Umbrella review outcome-level evidence grade: Substantial effect unlikely.

1 finding from 1 review

Vitamin D compounds (supplementation) vs placebo or control

Subperiosteal erosions · Adults with chronic kidney disease requiring dialysis

Meta-analysis of randomised trials of vitamin D supplementation for Subperiosteal erosions: RR 0.41 (95% CI 0.07 to 2.38), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Vitamin D compounds (supplementation) vs placebo or control

All‐cause mortality · Adults with chronic kidney disease not requiring dialysis

Meta-analysis of randomised trials of vitamin D supplementation for Mortality: RR 1.40 (95% CI 0.38 to 5.15), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Higher circulating 1,25-dihydroxyvitamin D (1,25(OH)2D) concentration vs Lower circulating 1,25-dihydroxyvitamin D (1,25(OH)2D) concentration

Colorectal cancer · Adults (general population)

Meta-analysis of observational studies (higher vs lower 1,25(OH)2D) for Colorectal cancer: OR 1.01 (95% CI 0.59 to 1.73), not statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Dual mini-screw implant vs Single mini-screw implant

Success of the anchorage device · Patients undergoing orthodontic treatment requiring surgical (mini-screw implant) anchorage

Dual mini-screw implant showed no clear difference in success of the anchorage device compared with single mini-screw implant; GRADE not reported.

1 finding from 1 review

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

Cardiovascular disease (prevalent) · Adults (general population)

Meta-analysis of observational studies (higher vs lower 25(OH)D) for Cardiovascular disease (prevalent): OR 0.67 (95% CI 0.55 to 0.82), statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Vitamin D vs placebo or control

Small‐for‐gestational age · pregnant women

Meta-analysis of randomised trials of vitamin D supplementation for Small for gestational age: RR 0.67 (95% CI 0.40 to 1.11), not statistically significant. Umbrella review outcome-level evidence grade: Suggestive.

1 finding from 1 review

Vitamin D compounds (supplementation) vs placebo or control

Creatinine clearance · Adults with chronic kidney disease not requiring dialysis

Meta-analysis of randomised trials of vitamin D supplementation for Creatinine clearance: WMD -1.68 (95% CI -6.92 to 3.56), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review

Vitamin D compounds (supplementation) vs placebo or control

Risk of hyperphosphataemia · Adults with chronic kidney disease requiring dialysis

Meta-analysis of randomised trials of vitamin D supplementation for Risk of hyperphosphataemia: RR 1.57 (95% CI 0.97 to 2.54), not statistically significant. Umbrella review outcome-level evidence grade: No conclusion.

1 finding from 1 review