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Table 2 Characteristics of the study districts (n = 17)

From: Does community social capital buffer the relationship between educational disadvantage and cognitive impairment? A multilevel analysis in Japan

  Mean ± SD Median Min–Max
Analytic sample
 Number of respondents to the mail-in questionnaire survey 273.5 ± 171.7 267 20–706
 Number of respondents to the home-interview survey 53.6 ± 31.0 53 4–116
Demographic factors
 Population size (persons) 1650.1 ± 750.5 1565 142–3351
 % of people aged ≥65 years 19.7 ± 6.0 17.4 11.9–33.4
 Population density (persons/km2) 8082.5 ± 2575.9 8074.6 1538.8–11,535.7
Social capital
 Low emotional support
  % of people who had no friends or one friend with whom they could talk about private affairs in the district 51.4 ± 4.9 49.5 45.0–60.0
 Low instrumental support
  % of people who had no friends or one friend who they could ask for help in the district 65.3 ± 3.9 63.8 60.7–72.7
 Weak social network
  % of people who answered “I only greet my neighbors” or “I am not friendly with my neighbors at all” in the district 37.8 ± 5.0 37.6 25.7–50.0
  1. SD standard deviation