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Table 2 Means and prevalences of social network parameters

From: Social networks in relation to self-reported symptomatic infections in individuals aged 40–75 - the Maastricht study –

  Mean (SD) or % (n)
Network size (number of alters) (mean, SD) 9.83 (5.17)
Contact frequency
 Total contacts per half year (mean, SD) 231.18 (141.16)
 Percentage of alters with daily-weekly ego/alter contact (mean, SD) 48.96 (25.88)
 Percentage of alters with monthly ego/alter contact (mean, SD) 23.34 (19.49)
 Percentage of alters with quarterly ego/alter contact (mean, SD) 12.50 (15.15)
 Percentage of alters with half-yearly ego/alter contact (mean, SD) 15.17 (19.47)
Proximity
 Percentage of alters who are household members (mean, SD) 15.43 (15.08)
 Percentage of alters living within walking distance (mean, SD) 28.80 (22.58)
 Percentage of alters living less than 1/2 h away by car (mean, SD) 38.35 (24.06)
 Percentage of alters living more than 1/2 h away by car (mean, SD) 13.93 (17.80)
 Percentage of alters living further away (mean, SD) 3.50 (8.97)
Mixing
 Percentage of same-sex alters (mean, SD) 58.15 (17.72)
 Percentage of same-age alters (±5 years) (mean, SD) 44.28 (21.20)
 Percentage of younger alters (> 15 years younger) (mean, SD) 6.50 (10.82)
 Percentage of younger alters (5 to 15 years younger) (mean, SD) 11.39 (14.29)
 Percentage of older alters (> 15 years older) (mean, SD) 26.73 (20.46)
 Percentage of older alters (5 to 15 years older) (mean, SD) 12.83 (15.56)
Heterogeneity
 Sex heterogeneity (IQV, range 0–1) (mean, SD) 0.85 (0.21)
 Age heterogeneity (SD) (mean, SD) 14.44 (5.17)
Type of relationship
 Participants who have a partner (%) 81.1 (n = 2436)
 Percentage of alters who are family members (mean, SD) 58.86 (24.03)
 Percentage of alters who are friends (mean, SD) 27.16 (21.23)
 Percentage of alters who are acquaintances (colleague, neighbor, club mate, other) (mean, SD) 13.98 (16.91)
Proxy for superficial contacts
 Number of club memberships (mean, SD) 1.07 (1.01)
 Number of clubs with daily/weekly participation (mean, SD) 0.77 (0.80)
 Number of clubs with monthly participation (mean, SD) 0.19 (0.45)
 Number of clubs with less frequent participation (mean, SD) 0.10 (0.34)
Network density
Density friends
 - low density (1–3) (%) 17.3 (n = 514)
 - medium density (4) (%) 42.9 (n = 1273)
 - high density (5) (%) 39.8 (n = 1179)
Density friends and family
 - low density (1–3) (%) 25.4 (n = 753)
 - medium density (4) (%) 43.9 (n = 1302)
 - high density (5) (%) 30.7 (n = 912)