What do systematic reviews say?

Live birth · women trying to conceive by intrauterine insemination

Adverse events, OHSS, preterm delivery, congenital anomaly · women trying to conceive by intrauterine insemination

Adverse events, OHSS, preterm delivery, congenital anomaly · women trying to conceive by intrauterine insemination

Surgery Number of participants who underwent surgery · people with non‐radicular low back pain

Participants who experienced a serious adverse event · people with non‐radicular low back pain

Adverse events as N of participants with at least one adverse event objective · people with spinal stenosis

Number of major adverse effects defined by the study, before discharge · women with urinary stress incontinence undergoing continence surgery

Number of women with sepsis or bacteraemia at hospital discharge · women with urinary stress incontinence undergoing continence surgery

Muscle strength · people undergoing peripheral nerve repair of the upper limb

Impact on daily living · people undergoing peripheral nerve repair of the upper limb

Retention in treatment · people with substance use disorders

Serious adverse events · people with substance use disorders

Serious adverse events · people with substance use disorders

Thromboembolic events · patients at any age with solid cancer or haematological malignancy

Thrombocytopenia or haemorrhage5 (Subnet based on 13 studies including 2744 participants) · patients at any age with solid cancer or haematological malignancy

Hypertension5 (Subnet based on 24 studies including 8383 participants) · patients at any age with solid cancer or haematological malignancy

Thrombocytopenia or haemorrhage5 (Subnet based on 13 studies including 2744 participants) · patients at any age with solid cancer or haematological malignancy

Hypertension5 (Subnet based on 24 studies including 8383 participants) · patients at any age with solid cancer or haematological malignancy

Haemoglobin response (Subnet based on 31 studies including 6985 participants) · patients at any age with solid cancer or haematological malignancy

Proportion of susceptible participants who experienced a reduction or resolution of existing motion sickness symptoms · patients with motion sickness