Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

637 questions · 714 findings · 96 reviews

No studies found 98 · 13.7%GRADE not reported 191 · 26.8%Very low 157 · 22%Low 161 · 22.5%Moderate 87 · 12.2%High 20 · 2.8%

HFNC vs continuous positive airway pressure (CPAP)

Adverse events ‐ nasal trauma · respiratory support in term infants (infants ≥ 37 weeks gestational age to the end of the neonatal period (up to 1 month postnatal age))

It is very uncertain whether summary of findings table ‐ High flow nasal cannula (HFNC) changes adverse events ‐ nasal trauma compared with continuous positive airway pressure (CPAP) (very low certainty).

1 finding from 1 review

HFNC vs continuous positive airway pressure (CPAP)

Adverse events ‐ abdominal overdistention · respiratory support in term infants (infants ≥ 37 weeks gestational age to the end of the neonatal period (up to 1 month postnatal age))

It is very uncertain whether summary of findings table ‐ High flow nasal cannula (HFNC) changes adverse events ‐ abdominal overdistention compared with continuous positive airway pressure (CPAP) (very low certainty).

1 finding from 1 review

High‐dose chemotherapy followed by autologous haematopoietic cell transplantation vs conventional chemotherapy plus whole lung irradiation

Event‐free survival · children, adolescents, and young adults with primary metastatic Ewing sarcoma

High‐dose chemotherapy followed by autologous haematopoietic cell… showed no clear difference in event‐free survival (reported as number of participants with… compared with conventional chemotherapy plus whole lung irradiation (low certainty).

1 finding from 1 review

High‐dose chemotherapy followed by autologous haematopoietic cell transplantation vs conventional chemotherapy plus whole lung irradiation

Overall survival · children, adolescents, and young adults with primary metastatic Ewing sarcoma

The review found no eligible studies for this question.

1 finding from 1 review

High‐dose chemotherapy followed by autologous haematopoietic cell transplantation vs conventional chemotherapy plus whole lung irradiation

Quality‐adjusted survival · children, adolescents, and young adults with primary metastatic Ewing sarcoma

The review found no eligible studies for this question.

1 finding from 1 review

High‐dose chemotherapy followed by autologous haematopoietic cell transplantation vs conventional chemotherapy plus whole lung irradiation

Toxicity · children, adolescents, and young adults with primary metastatic Ewing sarcoma

The review found no eligible studies for this question.

1 finding from 1 review

High‐dose chemotherapy followed by autologous haematopoietic cell transplantation vs conventional chemotherapy plus whole lung irradiation

Progression‐free survival · children, adolescents, and young adults with primary metastatic Ewing sarcoma

The review found no eligible studies for this question.

1 finding from 1 review

Highest vs lowest selenium exposure

Any cancer risk No. of participants: 19,475 (3 RCTs) · Participants in trials with low risk of bias

Highest showed no clear difference in any cancer risk No. of participants: 19,475 (3 RCTs) compared with lowest selenium exposure (high certainty).

1 finding from 1 review

Highest vs lowest selenium exposure

Cancer mortality risk No. of participants: 17,448 (1 RCT) · Participants in trials with low risk of bias

Highest showed no clear difference in cancer mortality risk No. of participants: 17,448 (1 RCT) compared with lowest selenium exposure (high certainty).

1 finding from 1 review

Highest vs lowest selenium exposure

Colorectal cancer risk (16 studies) · Participants in trials with low risk of bias

Highest showed no clear difference in colorectal cancer risk No. of participants: 19,009 (2 RCTs) compared with lowest selenium exposure (high certainty).

1 finding from 1 review

Highest vs lowest selenium exposure

Non‐melanoma skin cancer risk No. of participants: 2027 (2 RCTs) · Participants in trials with low risk of bias

Highest showed no clear difference in non‐melanoma skin cancer risk No. of participants: 2027 (2 RCTs) compared with lowest selenium exposure (moderate certainty).

1 finding from 1 review

Highest vs lowest selenium exposure

Lung cancer risk (17 studies) · Participants in trials with low risk of bias

Highest showed no clear difference in lung cancer risk No. of participants: 19,009 (2 RCTs) compared with lowest selenium exposure (high certainty).

1 finding from 1 review