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Table 2 Background characteristics of the study participants according to the recruitment scheme

From: The Tokyo Oldest Old Survey on Total Health (TOOTH): A longitudinal cohort study of multidimensional components of health and well-being

   In-home interview only In-home interview plus Medical/dental examination Self/proxy completed data only
   n = 442 n = 542 n = 168
Gender Male 26.0 (115) 43.5 (236) 26.2 (44)
  Female 74.0 (327) 56.5 (306) 73.8 (124)
Age 85-89 78.5 (347) 91.5 (496) 48.2 (81)
  90-94 18.1 (80) 7.0 (38) 41.1 (69)
  95-99 2.9 (13) 1.1 (6) 9.5 (16)
  100+ 0.5 (2) 0.4 (2) 1.2 (2)
Living condition
alone 40.6 (179) 34.0 (183) NA
with spouse only 28.6 (126) 27.0 (145) NA
with others 30.7 (135) 39.0 (210) NA
Education
Higher education 10.6 (47) 20.1 (109) NA
Self-rated health
Excellent to good 52.2 (230) 51.0 (274) NA
Fair to poor 47.8 (211) 49.0 (263) NA
Subjective economic status
Excellent to good 62.2 (255) 72.8 (378) 57.4 (93)
Fair to poor 37.8 (155) 27.2 (141) 42.6 (69)
MMSE
mean (SD) 23.7 (4.9) 26.2 (3.9) NA
median [IQR] 24 [21-27.5] 27 [24-29] NA
Barthel index
mean (SD) 78.7 (31.4) 97.1 (8.2) 56 (37)
median [IQR] 95 [70-100] 100 [95-100] 60 [20-95]
  1. Notes: Values are expressed as percentage (numbers) unless otherwise stated.
  2. NA; not applicable, SD: standard deviation, IQR; interqurtile range, MMSE; Mini-mental state examination.