Table 2 Characteristic of the participants at baseline in two survey periods
From: Loneliness as a risk factor for frailty transition among older Chinese people
|  | 3-year period (2008–2011) | 6-year period(2008–2014) |
|---|---|---|
|  | (N = 8425) | (N = 5245) |
Age, mean (SD) | 82.6 (11.0) | 79.1 (10.1) |
Gender:female,n(%) | 4607 (54.7) | 2800 (53.4) |
Education year, mean (SD) | 2.4 (3.6) | 2.6 (3.6) |
Residenc:Rural, n(%) | 5207 (61.8) | 3319 (63.3) |
Living arrangement: independently, n(%) | 1368 (16.2) | 843 (16.1) |
Relative economic status, n(%) | ||
 rich | 1467 (17.4) | 873 (16.7) |
 so so | 5778 (68.7) | 3622 (69.2) |
 poor | 1162 (13.8) | 740 (14.1) |
Current somker, n(%) | 1710 (20.3) | 1178 (22.5) |
Current drinker, n(%) | 1670 (19.8) | 1114 (21.2) |
Loneliness, n(%) | ||
 never | 3262 (41.9) | 2208 (43.8) |
 seldom | 2330 (29.9) | 1532 (30.4) |
 often | 2195 (28.2) | 1301 (25.8) |
No. of components of frail scale at baseline, mean (SD) | 1.20 (1.2) | 0.98 (1.1) |
Frailty index score at baseline, mean (SD) | 0.13 (0.1) | 0.11 (0.1) |