Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,257 questions · 1,337 findings · 183 reviews

No studies found 175 · 13.1%GRADE not reported 212 · 15.9%Very low 286 · 21.4%Low 341 · 25.5%Moderate 254 · 19%High 69 · 5.2%

Intervention not reported

Functional exercise capacity Multiple different outcome measures used SF‐36 PF and AT (at 9 and 26 weeks) (Batterham 2014) SF‐36 PF and 6MWT (at 8 and 26 weeks) (Elliott 2011) ABC, Katz, TUAG (at 3 months) (Jackson 2012) SF‐36 PCS ( · adult survivors of critical illness
1 finding from 1 review

DHEA or testosterone vs placebo/no treatment

Multiple pregnancy · women undergoing assisted reproduction

It is very uncertain whether DHEA or testosterone changes multiple pregnancy ‐ DHEA compared with placebo/no treatment (very low certainty).

2 findings from 1 review

Intervention not reported

Disability Multiple scales: scale from 0 to 100 (worse disability) · participants with low back pain

The intervention showed no clear difference in disability Multiple scales: scale from 0 to 100 (worse disability) (moderate certainty).

1 finding from 1 review

Intervention not reported

Disability Multiple scales: scale from 0 to 100 (worse disability) · participants with low back pain

The intervention showed no clear difference in disability Multiple scales: scale from 0 to 100 (worse disability) (moderate certainty).

1 finding from 1 review

Intervention not reported

Disability Multiple scales: scale from 0 to 100 (worse disability) · patients with low back pain

The intervention showed no clear difference in disability Multiple scales: scale from 0 to 100 (worse disability) (low certainty).

1 finding from 1 review

Intervention not reported

Disability Multiple scales: scale from 0 to 100 (worse disability) · patients with low back pain

The intervention showed no clear difference in disability Multiple scales: scale from 0 to 100 (worse disability) (moderate certainty).

1 finding from 1 review

Behavioural intervention vs control

Smoking cessation at time of surgery ‐ Intensive behavioural intervention (multiple contacts, initiated at least 4 weeks before surgery) · People awaiting surgery

Behavioural intervention probably leads to higher smoking cessation at time of surgery ‐ Intensive behavioural… compared with control (moderate certainty).

1 finding from 1 review

Intervention not reported

Function Multiple tools4 · patients with osteoarthritis
1 finding from 1 review

Intervention not reported

Multiple interventions · Employees who smoke

The intervention probably leads to higher multiple interventions (moderate certainty).

1 finding from 1 review

SMP vs usual care

Quality of life measured on multiple scales (0 to 100; higher score = better quality of life) Postintervention: first assessment after end of treatment; no later than 3 months · patients with osteoarthritis
1 finding from 1 review