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Table 1 Subject characteristics (n = 646)

From: Validation of the Burden Index of Caregivers (BIC), a multidimensional short care burden scale from Japan

  N %
Caregiver's age, y [Mean(SD)] 64.3(11.6)
Gender (Female) 412 65
Relationship of caregiver   
   Spouse 460 71
   Child/Child-in-law 138 21
   Other 48 7
Caregivers at work 147 23
Household income (Yen, millions)   
   <=3 250 41
   <=5 191 32
   <=7 81 13
   <=9 43 7
   >9 39 7
Duration of caregiving, y [Mean(SD)] 5.2(4.4)
Hours spent caregiving per day [Mean(SD)] 6.0 (6.3)
Hours required for close supervision of the patient [Mean(SD)] 5.2 (6.7)
Patient's age, y [Mean(SD)] 70.4 (9.6)
Diagnosis   
   PD (Parkinson's disease) 279 43
   SCD (spinocerebellar degeneration) 78 12
   MSA (multiple system atrophy) 39 6
   ALS (amyotrophic lateral sclerosis) 30 5
   CVA (cerebrovascular accident) 220 34
Duration of disease, y [Mean(SD)] 8.0 (6.1)
ADL (Index of activity of daily living by MHLW)   
   J/Independent 89 17
   A 177 34
   B 177 34
   C 74 14
SF-8 score [Mean(SD)]   
   PF (Physical Functioning)   2.4(1.2)
   RP (Role functioning Physical)   2.5(1.2)
   BP (Bodily Pain)   3.0(1.3)
   GH (General Health perceptions)   3.7(0.9)
   VT (Vitality)   2.9(0.9)
   SF (Social Functioning)   2.5(1.2)
   RE (Role functional Emotional)   2.5 (1.1)
   MH (Mental Health)   2.8 (1.1)
CES-D score [Mean(SD)]   15.6 (9.8)
ZBI score [Mean(SD)]   35.0(18.4)
Barthel Index (only CVA) [Mean(SD)]   53.0(34.0)
  1. SF-8: Health related quality of life scale, Short Form-8
  2. CES-D: Center for Epidemiologic Studies Depression scale
  3. ZBI: Zarit Burden Interview
  4. Income: 1 million yen is approximately equivalent to US$8,600