Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

128 questions · 130 findings · 41 reviews

No studies found 24 · 18.5%GRADE not reported 6 · 4.6%Very low 21 · 16.2%Low 38 · 29.2%Moderate 25 · 19.2%High 16 · 12.3%

Prophylactic valaciclovir (lower dose) vs Prophylactic valaciclovir (higher dose)

Adverse effects · Patients being treated for cancer (acute leukaemia; chemotherapy or stem-cell transplantation)
1 finding from 1 review

Vitamin D (higher dose) + micronutrient(s) vs vitamin D (lower dose) + micronutrient(s)

Adverse effect: hypercalciuria As defined by trialists Time frame: 3 months · children under 5 years of age

Vitamin D (higher dose) + micronutrient(s) showed no clear difference in adverse effect: hypercalciuria As defined by trialists Time frame: 3… compared with vitamin D (lower dose) + micronutrient(s) (low certainty).

1 finding from 1 review

Vitamin D (higher dose) + micronutrient(s) vs vitamin D (lower dose) + micronutrient(s)

Hypercalcaemia · children under 5 years of age

Vitamin D (higher dose) + micronutrient(s) showed no clear difference in adverse effect: hypercalcaemia As defined by trialists Time frame:… compared with vitamin D (lower dose) + micronutrient(s) (moderate certainty).

1 finding from 1 review

Summary of findings: Higher bladder volume vs lower bladder volume

Acute and late GI toxicity (grade 2+) · Men undergoing RT for prostate cancer

Summary of findings: Higher bladder volume showed no clear difference in acute and late GI toxicity (grade 2+) compared with lower bladder volume (low certainty).

1 finding from 1 review

Intervention not reported

Intervention: high‐dose radiotherapy Comparison: low‐dose radiotherapy Outcome: neurocognitive impairment at 2 years after treatment · people with glioma surviving at least two years

It is very uncertain whether the intervention changes intervention: high‐dose radiotherapy Comparison: low‐dose… (very low certainty).

1 finding from 1 review

Intervention not reported

Intervention: high‐dose radiotherapy Comparison: low‐dose radiotherapy Outcome: neurocognitive impairment at 5 years after treatment · people with glioma surviving at least two years

It is very uncertain whether the intervention changes intervention: high‐dose radiotherapy Comparison: low‐dose… (very low certainty).

1 finding from 1 review

Intervention diet vs usual on‐treatment diet

QoL · People undergoing pelvic radiotherapy for urological, gynaecological or colorectal cancer

Summary of findings: Diet interventions showed no clear difference in QOL scores (IBDQ) (higher scores better) compared with usual on‐treatment diet (low certainty).

1 finding from 1 review