Findings

What do systematic reviews say?

780 questions · 834 findings · 76 reviews

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No studies found 187 · 22.4%GRADE not reported 164 · 19.7%Very low 144 · 17.3%Low 172 · 20.6%Moderate 105 · 12.6%High 62 · 7.4%

Intramuscular vitamin K vs intravenous vitamin K

Bleeding complications: 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in bleeding complications: 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 7 [0.38, 129.11]
1 study · 52 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Necrotizing enterocolitis: 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in necrotizing enterocolitis: 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1.08 [0.16, 7.1]
1 study · 54 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Sepsis: 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in sepsis: 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1 [0.28, 3.58]
1 study · 52 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Sepsis diagnosed after randomisation: range 28 d to 60 d · preterm infants

Intramuscular vitamin K showed no clear difference in sepsis: 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 0.86 [0.26, 2.86]
1 study · 54 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Mortality (all infants): 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in mortality (all infants): 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1.32 [0.56, 3.14]
1 study · 67 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Mortality (all infants): 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in mortality (all infants): 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 2.82 [0.84, 9.46]
1 study · 64 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Bleeding complications: 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in bleeding complications: 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 0.81 [0.2, 3.27]
1 study · 54 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Intraventricular hemorrhage > Grade II: 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in intraventricular hemorrhage > Grade II: 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 2 [0.19, 20.72]
1 study · 52 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Intraventricular hemorrhage > Grade II: 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in intraventricular hemorrhage > Grade II: 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 0.72 [0.13, 3.96]
1 study · 54 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Presence of PIVKA II at day 5: 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in presence of PIVKA II at day 5: 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1.52 [0.37, 6.23]
1 study · 60 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Presence of PIVKA II at day 5: 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in presence of PIVKA II at day 5: 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 2.07 [0.41, 10.43]
1 study · 57 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Presence of PIVKA II at day 25: 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in presence of PIVKA II at day 25: 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1.08 [0.07, 16.36]
1 study · 52 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Presence of PIVKA II at day 25 ‐ 0.2 mg IV versus 0.5 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in presence of PIVKA II at day 25 ‐ 0.2 mg IV versus 0.5 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1.04 [0.07, 15.74]
1 study · 51 participants
Low

Intramuscular vitamin K vs intravenous vitamin K

Necrotizing enterocolitis ‐ 0.2 mg IV versus 0.2 mg IM · preterm infants

Intramuscular vitamin K showed no clear difference in necrotizing enterocolitis ‐ 0.2 mg IV versus 0.2 mg IM compared with intravenous vitamin K (low certainty).

1 finding from 1 review

Prophylactic vitamin K for the prevention of vitamin K deficiency bleeding in preterm neonates 2018 · Cochrane Headline outcomes only
RR 1 [0.15, 6.57]
1 study · 52 participants
Low

Vitamin A vs placebo

Change in vitamin A concentrations (µmol/L) · adults with HIV infection

1 finding from 1 review

Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
no estimate extracted
3 studies · 495 participants
Low

Vitamin D vs placebo

Change in 25(OH) vitamin D concentrations (ng/mL) · adults with HIV infection

1 finding from 1 review

Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
no estimate extracted
4 studies · 299 participants
Moderate

Vitamin D vs placebo or no intervention

Cancer occurrence · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…

Vitamin D showed no clear difference in cancer occurrence compared with placebo or no intervention (moderate certainty).

1 finding from 1 review

Vitamin D supplementation for prevention of cancer in adults 2014 · Cochrane Headline outcomes only
RR 1 [0.94, 1.06]
18 studies · 50623 participants
Moderate

Vitamin D vs placebo or no intervention

All‐cause mortality · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…

Vitamin D may leads to lower all‐cause mortality compared with placebo or no intervention (low certainty).

1 finding from 1 review

Vitamin D supplementation for prevention of cancer in adults 2014 · Cochrane Headline outcomes only
RR 0.93 [0.88, 0.98]
15 studies · 49866 participants
Low

Vitamin D vs placebo or no intervention

Health‐related quality of life · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin D supplementation for prevention of cancer in adults 2014 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Vitamin D vs placebo or no intervention

Health economics · healthy participants or recruited among the general population; individuals diagnosed with a specific disease in a stable phase or with…

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin D supplementation for prevention of cancer in adults 2014 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found