Phototest for neurocognitive screening in multiple sclerosis

Joana Pinto1,2, Emanuela Lopes2, Gerly Gonçalves2

  • 1CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Gandra, Portugal.

Insights

The Phototest (PT) effectively screens for cognitive impairment in Multiple Sclerosis (MS), demonstrating high sensitivity and specificity. This brief, motor-function-independent test aids in identifying MS patients needing further neuropsychological evaluation.

Area of Science:

  • Neurology
  • Neuropsychology
  • Cognitive Science

Background:

  • Multiple Sclerosis (MS) is a common neurological disorder.
  • Cognitive dysfunction is a key clinical feature in MS, affecting about half of patients.
  • Early detection of cognitive impairment is crucial for timely intervention.

Purpose of the Study:

  • To evaluate the Phototest (PT) as a neurocognitive screening tool for MS.
  • To assess the diagnostic accuracy of the PT in detecting cognitive impairment in MS patients.

Main Methods:

  • The study included 30 MS patients and 19 healthy controls.
  • Participants underwent the Phototest (PT), Montreal Cognitive Assessment (MoCA), Barthel Index (BI), EDSS, and FSS.
  • Statistical analysis compared PT performance between groups and with MoCA.

Main Results:

  • MS patients scored significantly lower on most PT domains compared to controls.
  • The PT demonstrated strong concurrent validity with the MoCA.
  • The PT exhibited higher sensitivity and specificity than MoCA for MS-related cognitive impairment, with a cut-off of 31 yielding 100% sensitivity and 76.7% specificity.

Conclusions:

  • The Phototest is a valid, sensitive, and specific screening tool for MS neurocognitive deficits.
  • It is brief, cost-effective, and not influenced by motor function.
  • The PT is a valuable option for identifying MS patients requiring further neuropsychological assessment and intervention.

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