Affinity trial a ssessment o f f luoxet in e i n s t roke recover y
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AFFINITY trial A ssessment o F F luoxet IN e I n s T roke recover Y. Co- principal investigators: Hackett M, Hankey GJ. Steering committee: Almeida O, Anderson CS, Beer C, Billot L, Dennis MS, Flicker L, Ford A, Jan S, Mead G. The burden of disability due to stroke.

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AFFINITY trial A ssessment o F F luoxet IN e I n s T roke recover Y

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Affinity trial a ssessment o f f luoxet in e i n s t roke recover y

AFFINITY trialAssessment oFFluoxetINe In sTroke recoverY

Co- principal investigators: Hackett M, Hankey GJ.

Steering committee: Almeida O, Anderson CS, Beer C, Billot L, Dennis MS, Flicker L, Ford A, Jan S, Mead G


The burden of disability due to stroke

The burden of disability due to stroke

  • 4th leading cause of global disease burden

  • 16 million 1st-ever events

  • 51 million disability-adjusted life years

  • 5.7 million deaths

  • 50% of stroke survivors have long-term residual disability.

    • How can we improve recovery & reduce disability after stroke?


Fluoxetine

Fluoxetine

Animal studies suggest fluoxetine is effective

?directly improves motor function

? indirectly improves motivation and attention

FLAME trial (Lancet Neurology, 2011;10:123-130)

  • Fluoxetine on Motor Rehabilitation after ischaemic stroke

  • RCT: 118 with acute ischaemic stroke & unilateral motor weakness

  • Intervention: 20 mg fluoxetine daily, 3 months vs. placebo


Affinity trial a ssessment o f f luoxet in e i n s t roke recover y

FLAME trial: Modified Rankin score at 90 daysmRS 0-2: 26.3% fluoxetine vs 8.9% placeboOR = 3.8, 95% CI 1.2 to 10.7


Flame trial fugl meyer motor scores

FLAME trial: Fugl Meyer Motor scores

Adjusted mean Fugl-Meyer motor scale (FMMS) total scores at days 0, 30, and 90

Error bars represent 95% CI


Rationale for a new trial

Rationale for a new trial

FLAME results promising, however:

  • ? Internal validity (Random error)

    • only 57 pts assigned fluoexetine vs 56 placebo

    • Wide 95% CI of estimates (Independency OR = 3.8, 95% CI 1.2 to 10.7)

  • ? External validity (generalisability)

    We need to know:

  • Does fluoxetine really work?

  • Are the results generalisable to an Australian population?

  • Do the benefits persist after treatment has ceased?


Affinity trial a ssessment o f f luoxet in e i n s t roke recover y

Assessment oFFluoxetine IN sTroke recoverY

(AFFINITY) trial


Primary aim

Primary aim

1 ◦ To determine if taking fluoxetine, 20 mg, once daily, for 6 months, started 2-15 days post acute stroke improves participants’ neurological outcome (functional ability).


Secondary aims

Secondary aims

2◦ To determine if fluoxetine…

  • Improves at 6 months

    • survival,

    • mood (PHQ-9),

    • cognitive function (TICSm),

    • HRQoL (SF-12),

  • Reduces at 6 months

    • fatigue (SF-36 vitality domain)

  • Is safe

  • Reduces the cost of health and social care

  • Has persisting effects at 12 months on:

    • functional ability, survival, mood, cognitive function, HRQoL, and fatigue


Inclusion criteria

Inclusion criteria

  • Male or female

  • ≥ 18 years of age

  • Clinical diagnosis of stroke; onset 2-15 days ago

  • Imaging consistent with ICH or ischaemic stroke

  • Neurological deficits at randomisation which are severe enough to warrant Rx (pt or carer perspective)


Exclusion criteria

Exclusion criteria

  • History of:

    • Epileptic seizures

    • Bipolar disorders

    • Drug overdose

    • Attempted suicide

    • Allergy to fluoxetine

  • Current or recent (<5/52) Rx with MAOI or pimozide

  • Current or recent (<1/12) depression requiring Rx with SSRI

  • Current Rx with other antidepressants unless agree to discontinue on randomisation

  • Unlikely to be contactable or available for follow-up over 12 months

  • Unlikely to survive 12 months (e.g. life-threatening illness)

  • SAH (except if 2◦ to ICH)

  • Pregnant or breast feeding, female of child bearing age not on adequate contraception

  • Hepatic impairment (ALT < 120 U/L)

  • Renal impairment (Creatinine > 220 micromol/l)

  • Hyponatraemia (Sodium < 130mmol/L)


Trial recruitment and assessments from the patients perspective

Trial recruitment and assessments: from the patients’ perspective

Approached by member of clinical team

Receive patient information leaflet and verbal explanation

They have time to consider whether they wish to take part

They, or their next of kin give consent if wish to join the trial

They provide information which is entered into the trial database


Randomisation

Randomisation

Web-based, central randomisation service

Rx allocation ratio 1:1

Stratified randomisation:

Presence of a motor deficit

Presence of aphasia

(i.e. allocates each patients to the Rx that leads to the least difference between the two groups with respect to these features)


Intervention

Intervention

  • Fluoxetine 20 mg/day or Placebo one/day

    • Oral

    • Double-blind

    • 6 months


Outcome measures

Outcome measures

  • Primary: modified Rankin score at 6 months

  • Secondary

    • Adherence to medication

    • New clinical diagnosis of depression

    • Survival

    • Depression (PHQ 9; 9 questions)

    • Cognition (TICSm; 13 questions)

    • Fatigue (Vitality score of SF-36; 4 questions)

    • Resource use (3 questions)

      Optional

    • Overall health status: Stroke impact score (59 items, 8 domains)

    • Health-related quality of life (SF 12; 12 questions)


Adverse effects bmj 2011 343 d4551 d4660

Adverse effectsBMJ 2011; 343: d4551; d4660

  • Stroke or TIA (HR 1.15; 95% CI: 1.05 to 1.26)

  • Myocardial infarction

  • Epileptic seizures (HR 1.80; 1.32 to 2.43)

  • Falls (HR 1.27; 1.20 to 1.35)

  • Fractures (HR 1.26; 1.15 to 1.37)

  • Hyponatraemia (HR 1.44; 1.19 to 1.75

  • Attempted suicide/self harm (HR 1.27; 0.97 to 1.66)

  • Upper GI bleeding (HR 1.22; 1.07 to 1.40)


Adverse effects of newer antidepressants and suggested management bmj 2012 344 d8300

Adverse effects of newer antidepressants and suggested management.BMJ 2012; 344: d8300.

Adverse effectCommentManagement

  • Dizziness< 10% Check BP standing and lying; symptoms may improve over time; Decrease dose or change treatment. Ensure adequate fluid intake

  • SedationNot common May be desirable; May improve over time.

    Change time of dosing and treatment

  • Dry mouthProbably dose relatedTolerance may develop; change treatment;

    Sugarless gum or saliva substitutes

  • Sexual dysfunctionCommon Reduce dose, wait for improvement, switch to a different antidepressant, or consider sildenafil

  • InsomniaCommon Try to distinguish from insomnia caused by depression

    Change time of dosing (earlier or later may help), improve sleep hygiene,

    try a different antidepressant, or short course of benzodiazepine, zopiclone, or low dose trazadone

  • Suicidal thoughtsAge < 30Review often (within a week of starting Rx and until no longer needed).

    No evidence that asking about suicide increases likelihood of self- harm. Prescribe small amounts of medication.

  • AnxietyOften when starting RxConsider using a benzodiazepine for no longer than two weeks

  • HyponatraemiaA problem in the elderly Check sodium before and after starting treatment

    Consider changing to mirtazapine if it becomes problematic

  • Serotonin syndromeConfusion/agitation, Stop the antidepressant

    Autonomic instability,and Hydration, Rx of hyperthermia, and benzodiazepines

    Neuromuscular hyperactivity Consider cyproheptadine or chlorpromazine in severe cases

  • Discontinuation syndrome Decrease dose over four weeks. Warn the patient


Sample size calculations

Sample size calculations

  • Expect % of independent participants (mRS 0-2) in intervention group to:

    • increase by 7.5% absolute percentage points (from 50% to 57.5%)

    • increase by 15 relative percentage points,

    • odds ratio of 1.35

      • (cf. FLAME: OR = 3.8, 95%: CI 1.2 to 10.7)


Trial design flow of participants and assessments

1,580 patients

Informed consent and trial specific screen and baseline assessment

Central randomisation 2 to 15 days post-stroke

Intervention group (n=790)

Control group (n=790)

1 month on-intervention assessment

3 month on-intervention assessment and dispensing

End of 6-month intervention assessment

6-month off-intervention (12 month) assessment

Trial design:Flow of participants and assessments


Collaborators uk focus prof martin dennis prof gillian mead

Collaborators (UK FOCUS)Prof Martin Dennis Prof Gillian Mead

  • Larger, similar trial

  • FOCUS pilot phase

    • Funded by The Stroke Association

    • Protocol funded by NIHR Stroke Research Network

  • FOCUS main phase

    • Funding application to NIHR HTA

  • Planned prospective meta-analysis


Affinity focus joint analyses

AFFINITY/FOCUS joint analyses

FOCUS aims to recruit 3000

If we complete both FOCUS and AFFINITY and enrol 4500 patients we could reliably detect a 4.4% absolute increase in mRS 0-2.


We welcome interested collaborators

We welcome interested collaborators


Back up

Back up


Management of depression

Management of depression

Options

Give fluoxetine 20mg od (but potentially ‘dilute’ treatment effect)

Tricyclic antidepressant

Mirtazipine: favoured by Allan House, literature suggests interactions are uncommon and not serious


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