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Table 4 Distribution-based CID (SD multiples) and MCT lower limit (SEM) estimates for the FACT-Cog total score and perceived cognitive impairments subscale

From: Important differences and meaningful changes for the Functional Assessment of Cancer Therapy-Cognitive Function (FACT-Cog)

  N SD One-third SD One-half SD 1 SEM, ρT-RT = 0.74 1 SEM, ρT-RT  = 0.70
FACT-Cog score (33 items)
 T1: Baseline 242 23.13 7.7 11.6 11.8 12.7
 T2: Post-intervention 192 26.31 8.8 13.2 13.4 14.4
 T3: Six-month follow-up 184 26.29 8.8 13.1 13.4 14.4
 Mean   25.24 8.4 12.6 12.9 13.8
FACT-Cog PCI
 T1: Baseline 242 14.77 4.9 7.7 7.5 8.1
 T2: Post-intervention 192 16.61 5.5 8.8 8.4 9.1
 T3: Six-month follow-up 184 16.17 5.4 8.8 8.2 8.9
 Mean   15.85 5.3 7.9 8.1 8.7
  1. Definitions: SD Standard deviation, SEM Standard error of measurement = σ√(1 − ρT-RT)