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Table 2 Outcome measures

From: Evidence-based care of older people with suspected cognitive impairment in general practice: protocol for the IRIS cluster randomised trial

Outcome

Data collection method

Outcome assessment period

Source

Level data collected

Primary outcomes

GP behaviour

    

Cognitive assessment using MMSE1*

Clinical Audit Tool (CAT) electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Depression assessment using validated scale1*

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Secondary outcomes

    

GP behaviour

    

Referral to CDAMS or specialist1†

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Referral for CT scan1*

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Dementia Diagnosis1

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Cognitive assessment using MMSE (all patients aged 70+ years)3*

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Reported suspicion of cognitive impairment (all patients aged 70+ years)3

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Dementia diagnosis (all patients aged 70+ years)3

CAT electronic search

Baseline & 9 months post workshop delivery2

Medical record

Patient

Proxy measures of GP behaviour

    

Self-report of adherence to recommended behaviours:

Questionnaire

Baseline & 9 months post workshop delivery

Practitioner

Practitioner

 Cognitive assessment using MMSE*

(1 item each)

 Depression assessment using validated scale*

 Referral to CDAMS or specialist†

 Referral for CT scan*

 Review of medications§

 Ordering of pathology tests‡§

Behavioural simulation to adhere to recommended behaviours:

Questionnaire (clinical vignettes)

9 months post workshop delivery

Practitioner

Practitioner

 Cognitive assessment using MMSE*

 Depression assessment using validated scale*

 Referral to CDAMS or specialist†

 Referral for CT scan*

 Review of medications§

 Ordering of pathology tests‡§

 Disclosure of diagnosis to patient‡§

 Disclosure of diagnosis to carer‡§

Hypothesised mediators of GP behaviour

    

Intention to adhere to recommended behaviours:

Questionnaire

Baseline & 9 months post workshop delivery

Practitioner

Practitioner

 Cognitive assessment using MMSE*

(3 items)

 Depression assessment using validated scale*

(3 items)

 Disclosure of diagnosis to patient‡§

(6 items)

 Disclosure of diagnosis to carer‡§

(2 items)

Behavioural constructs for primary outcomes4

Questionnaire

Baseline & 9 months post workshop delivery

Practitioner

Practitioner

(47 items)

  1. Symbols indicate source of recommended behaviour: * SIGN guideline; † Local adaptation of SIGN guideline (by IRIS clinical investigators); ‡ Other guidelines; § Considered best practice by the IRIS clinical investigators.
  2. 1Active patients aged 70 years and over in whom the GP suspects cognitive impairment at baseline (cohort 2). Active is defined as a minimum of three visits recorded in the general practice clinical desktop system in the two-year period preceding follow-up (nine months post workshop delivery)).
  3. 2For this variable, the outcome is measured over the two-year period prior to randomisation and nine months post workshop delivery.
  4. 3Active patients aged 70 years and older (cohort 1). See footnote 1 for the definition of active.
  5. 4Table 3 provides details of behavioural construct domains for the primary outcomes.
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Implementation Science

ISSN: 1748-5908