Table E-1. Baseline characteristics of the 9,079 non-demented participants in the 3C study according to their status at follow-up. Participants without follow-up include 212 subjects deceased before the first follow-up and 782 refusals. Values are number (percentage) unless otherwise indicated.

Characteristic / Participants with at least one follow-up / Participants without
follow-up / P value
N / 8085 / 994
Mean age (SD) / 74.0 / (5.42) / 76.1 / (6.19) / < 0.0001
Women (%) / 4962 / (61.4) / 563 / (56.6) / < 0.01
Education (%)
No or primary
Secondary
High school
University
Missing / 1982 2905
1628 1557
13 / (24.5)
(36.0)
(20.2)
(19.3) / 339
333
189
130
3 / (34.2)
33.6
(19.1)
(13.1) / < 0.0001
Monthly income (%)
< 750 €
750-1500 €
1500-2250 €
> 2250 €
Refused to answer
Missing / 397
2372
2151
2683
228
254 / (5.1)
(30.3)
(27.5)
(34.2)
(2.9) / 83
287
252
282
41
49 / (8.8)
(30.4)
(26.7)
(29.8)
(4.3) / < 0.0001
Marital status (%)
Married
Divorced
Widowed
Single
Missing / 4778
583
2115
570
39 / (59.4)
(7.2)
(26.3)
(7.1) / 581
61
276
65
11 / (59.1)
(6.2)
(28.1)
(6.6) / 0.44
City
Bordeaux
Dijon
Montpellier / 1771
4362
1952 / (21.9)
(54.0)
(24.1) / 255
501
238 / (25.6)
(50.4)
(24.0) / 0.02
Smoking status (%)
Never
Former
Current
Missing / 4979
2673
430
3 / (61.6)
(33.1)
(5.3) / 583
330
80
1 / (58.7)
(33.2)
(8.1) / < 0.01
Hypertension (%)
Yes
No
Missing data / 6234
1851
0 / (77.1) / 794
193
7 / (80.5) / 0.02
Diabetes (%)
Yes
No
Missing data / 760
6995
330 / (9.8) / 114
689
191 / (14.2) / <0.0001
Hypercholesterolemia
Yes
No
Missing data / 4518
3320
247 / (57.6) / 482
367
145 / (56.8) / 0.63
BMI (%)
< 21 kg/m²
[21-27[ kg/m²
 27 kg/m²
Missing / 833
4562
2631
59 / (10.4)
(56.8)
(32.8) / 130
515
322
27 / (13.4)
(53.3)
(33.3) / < 0.01
ApoE allele (%)
No
Yes
Missing / 6162
1547
376 / (79.9)
(20.1) / 615
169
210 / (78.4)
(21.6) / 0.32