Table 1 Characteristics at age 85 of the study population (n=378) and the participants who died (n=137) or refused participation before the age of 88 years (n=40) or had no four creatinine measurements between 85 and 88 years (n=7)

Socio-demographics

  Male Sex (%)

113 (30%)

73 (40%)

<0.01

  Low level of education (%)

234 (62%)

129 (70%)

<0.01

  Low income (%)

194 (51%)

92 (50%)

0.62

  Institutionalised

48 (13%)

51 (28%)

<0.01

eGFR at age 85 (ml/min/1.73m²)

>60

169 (44%)

73 (40%)

45-60

147 (39%)

69 (38%)

<45

62 (16%)

42 (23%)

0.02

Functional score (median (IQR))

MMSE

25 (19-25)

24 (18-24)

<0.01

GDS

2 (0-5)

2 (1-4)

0.01

ADL

12 (9-17)

13 (10-19)

<0.01