International psychogeriatrics · 2014
Clinician and caregiver agreement on neuropsychiatric symptom severity: a study using the Neuropsychiatric Inventory - Clinician rating scale (NPI-C).
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Zaidi Shirin, Kat Martin G, de Jonghe Jos F M
Аннотация
BACKGROUND: Neuropsychiatric symptoms (NPS) are highly prevalent in dementia. The recently developed Neuropsychiatric Inventory - Clinician rating scale (NPI-C) includes clinical judgment and new symptom domains. Our objective was to evaluate NPI-C reliability and to compare caregiver and clinician ratings across the range of mild to severe cognitive impairment.
METHODS: This is a cross-sectional observational study. Participants were geriatric memory clinic patients and nursing-home residents (n = 30) with an established diagnosis of dementia or Mild Cognitive Impairment (MCI). A psychiatrist (MK) interviewed caregiver-patient dyads using the NPI-C. Neuropsychological tests and Mini-Mental State Examination (MMSE) were used to assess cognitive impairment. Two NPI-C caregiver interviews were videotaped and rated by psychologists and geriatricians. Intra-class correlations (ICCs) were used to examine inter-rater agreement. Correlation coefficients were calculated to evaluate caregiver and psychiatrist NPI-C ratings. Disagreement between caregiver and clinician was expressed in delta scores and examined across the range of mild to severe cognitive impairment, using Levene's homogeneity of variances tests.
RESULTS: Inter-rater agreement on ratings of two caregiver videos was high (ICC = 0.99-1.0). Clinician-caregiver concordance on NPI-C total severity ratings was high (r = 0.77). Variability in clinician-caregiver concordance was associated with cognitive impairment: MMSE (P = 0.02), CAMCOG-R (Cambridge Cognitive Examination-revised) total scores (P = 0.02), CAMCOG-R Memory scores (P = 0.04) and Language scores (P = 0.01).
CONCLUSIONS: The NPI-C is a reliable measure of NPS in patients with MCI or dementia. Clinician-caregiver agreement on NPS severity may vary with cognitive impairment, underlining the importance of clinician-based measures of NPS.
METHODS: This is a cross-sectional observational study. Participants were geriatric memory clinic patients and nursing-home residents (n = 30) with an established diagnosis of dementia or Mild Cognitive Impairment (MCI). A psychiatrist (MK) interviewed caregiver-patient dyads using the NPI-C. Neuropsychological tests and Mini-Mental State Examination (MMSE) were used to assess cognitive impairment. Two NPI-C caregiver interviews were videotaped and rated by psychologists and geriatricians. Intra-class correlations (ICCs) were used to examine inter-rater agreement. Correlation coefficients were calculated to evaluate caregiver and psychiatrist NPI-C ratings. Disagreement between caregiver and clinician was expressed in delta scores and examined across the range of mild to severe cognitive impairment, using Levene's homogeneity of variances tests.
RESULTS: Inter-rater agreement on ratings of two caregiver videos was high (ICC = 0.99-1.0). Clinician-caregiver concordance on NPI-C total severity ratings was high (r = 0.77). Variability in clinician-caregiver concordance was associated with cognitive impairment: MMSE (P = 0.02), CAMCOG-R (Cambridge Cognitive Examination-revised) total scores (P = 0.02), CAMCOG-R Memory scores (P = 0.04) and Language scores (P = 0.01).
CONCLUSIONS: The NPI-C is a reliable measure of NPS in patients with MCI or dementia. Clinician-caregiver agreement on NPS severity may vary with cognitive impairment, underlining the importance of clinician-based measures of NPS.