international neonatal immunotherapy study. co-ordinating centre national perinatal epidemiology...
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International Neonatal International Neonatal Immunotherapy StudyImmunotherapy Study
Co-ordinating Centre
National Perinatal Epidemiology Unit
Oxford
www.npeu.ox.ac.uk/inis
INIS
is funded by the
Medical Research Council
INIS - hypothesis
The addition of non-specific polyclonal immunoglobulin reduces death and major disability in infants receiving antibiotics for
serious sepsis
International randomised controlled International randomised controlled trial evaluating the use of trial evaluating the use of
intravenous immunoglobulin (IVIG) intravenous immunoglobulin (IVIG) for the reduction of death or disability for the reduction of death or disability
in infants with sepsisin infants with sepsis
INIS – the reality
Current Status
• 5th year of study
• 3286 babies recruited (at 27/03/07)
• 48 centres in UK
• 21 Argentina
• 17 Australia
• 2 New Zealand
• 8 Europe
Future
• MRC funding awarded to extend recruitment until Summer 2007
• 97 centres worldwide
• Target of at least 3500 babies
Background
Neonatal sepsis
• Incidence 6.6 per 1000 live births 1
15.4 per 1000 VLBW 2
• Death VLBW 14% -21% 3
All 10 -14%
Sepsis and neurodevelopment
• Studies show a strong association between intrauterine sepsis and both cPVL and cerebral palsy 5
• In addition there is evidence to show a link between postnatal infection and cerebral palsy 6
Intrauterine sepsis and neurodevelopment
• Babies born to mothers with clinical chorioamnionitis have a statistically significant higher risk of developing cerebral palsy 5
– Term infants – RR 4.7 (1.3,16.2)– Preterm infants – RR 1.9 (1.4-2.5)
Postnatal sepsis and neurodevelopment
• Postnatal infection is associated with an increased risk of cerebral palsy (after adjustment for gestational age) 6
• OR 3.6 (1.8, 7.4)
Treatment for sepsis• Newborn infants, especially if small or preterm,
may be deficient in immunoglobulin (IgG)
• IVIG provides IgG which has potent anti-inflammatory and immuno-modulatory properties
• This makes it an attractive adjunctive treatment for sepsis in all babies, not just the preterm population
Evidence
Systematic Reviews• Intravenous immunoglobulin for preventing infection in
preterm and low birth weight infants Ohlsson A, Lacy JB. In: The Cochrane Library, Issue 1, 2003.
• Intravenous immunoglobulin for suspected or subsequently proven infection in neonate
Ohlsson A, Lacy JB. In: The Cochrane Library, Issue 1, 2003.
• Intravenous immunoglobulin for treating sepsis and septic shock Alejandria MM, Lansang MA, Dans LF, Mantanng JBV. In The Cochrane Library, 2003.
Cochrane systematic review– IVIG for prevention of infection
• 19 RCTs, 5054 infants
• Results:– Reduction in sepsis - RR 0.85 (0.74-0.98)– No effect on death
• No major adverse effects from immunoglobulin
Cochrane systematic review– IVIG for treatment of infection
• Suspected infection
• 6 RCTs, n=318• Reduction in death
not statistically significant
• RR 0.63 (0.4,1.00)
• Proven infection• 7 RCTS, n=262• Statistically significant
reduction in death
• RR 0.55 (0.31,0.98)
Cochrane systematic review– IVIG for treatment of infection
• Criticisms of RCTs based on :– Small size; 22-82 infants per study– Poor study designs – Lack of placebo group– Absence of blinding
Cochrane SR – suspected infection
Cochrane SR– proven infection
Cochrane systematic review – IVIG for treatment of sepsis or septic shock
• 11 RCTs, 492 patients (any age)• Results:
– All ages - reduction in all cause death – RR 0.64 (95% CI 0.51-0.80)– Neonates – no statistically significant
difference– RR 0.70 (0.42,1.18)
Summary of evidence
• Insufficient and weak evidence to support use of immunoglobulin for prevention or treatment of sepsis
• Large RCT needed to test hypothesis
Study Design
Study design
• ‘The randomised double-blind controlled trial is usually taken as the ‘gold standard’ against which to judge the quality of the design of a trial.’
• The design of INIS adheres to these principles
Study design
• Randomisation:
– Controls for known and unknown confounders
– Ensures treatment allocation is unbiased at the start of the trial
Study design
• Randomisation– Drug packs are pre-randomised and kept on
unit– So no phone calls to randomise an eligible
baby!– Selecting the lowest numbered drug pack will
ensure randomisation is intact
Study design• Placebo-controlled
– The placebo is a weak solution of albumin– It is identical in appearance to the IVIG both in
its reconstituted form and in its packaging
Study design• Blindness
– INIS is a double-blind trial– Neither the attending medical staff nor those
evaluating outcomes will know which treatment has been given
– This avoids any bias whilst the study is
being run
Eligibility Criteria
Receiving antibiotics and suspected or proven serious sepsisAND
At least one of the following:birth weight less than 1500greceiving respiratory support via an
endotracheal tube evidence of infection in blood culture, CSF or
usually sterile body fluid
AND
There is substantial uncertainty that IVIG is indicated
Eligibility
Exclusion criteria
• IVIG already given*
• IVIG thought to be needed or contraindicated
*Specific IVIG
*Specific IVIG
• IVIG for specific indications should be given as per hospital policy and these infants will still be eligible
– Hepatitis B immunoglobulin– Varicella-Zoster immunoglobulin
Eligibility - age
• Babies at any age whilst resident on NICU
• After discharge babies are eligible until EDD plus 28 days
Consent• Consent must be fully informed and obtained
before randomisation
• Use the Patient Information Leaflet– This is for relevant for all parents whose baby is
admitted to NICU– It gives a simple and accurate description of the study
• Direct parents to website or INIS contact
InterventionIVIG group• Intravenous infusion of IVIG 500 mg / kg
(10ml/kg) over 4 - 6 hours, repeated 48 hours later
Control group• Intravenous infusion of 10 ml / kg of placebo
(0.2% albumin solution), repeated 48 hours later
IVIG
• Plasma from non-UK donors
• Produced by Scottish National Blood Transfusion Service
• Tested for HIV 1 ,2 and Hepatitis A,B,C
• Excellent safety record
• Few adverse reactions
Placebo
• 0.2% albumin
• Identical appearance to IVIG
• Safety record as for IVIG
• Death or
• Major disability at 2 years corrected age
Primary Outcome
Secondary Outcomes
• Short term– Death, chronic lung disease or major cerebral
abnormality before hospital discharge– Significant positive culture after trial entry– Pneumonia– NEC– Duration of respiratory support
Secondary Outcomes
• Long term– Death before 2 years– Major disability at 2yrs– Non-major disability at 2yrs
• Parent questionnaire
• Paediatrician questionnaire
• Completed at 2 year appointment
Follow-up
If you have any queries please contact :
Clare Shakeshaft INIS Study Co-ordinator
01865 [email protected]
www.npeu.ox.ac.uk/inis