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. Author manuscript; available in PMC: 2009 May 15.
Published in final edited form as: J Neurol Neurosurg Psychiatry. 2009 Apr 9;80(5):494–497. doi: 10.1136/jnnp.2008.162701

Table 1.

Baseline characteristics (ethanol drinkers vs. non-drinkers and incident ET cases vs. control subjects)

Baseline characteristics Ethanol Drinkers
n = 1,838
Non-drinkers
n = 1,447
Incident ET cases
n = 76
Control subjects
n = 3,209
Age in years (mean ± SD) 73.1 ± 6.5*** 74.1 ± 6.7 73.7 ± 6.4 73.5 ± 6.6
Gender (women) 648 (35.3%)*** 1,219 (84.2%) 45 (59.2%) 1,822 (56.8%)
Educational level
 Illiterate
 Can read and write
 Primary studies
 Secondary studies

159 (8.7%)***
823 (44.8%)
519 (28.2%)
337 (18.3%)

257 (17.8%)
566 (39.1%)
455 (31.4%)
169 (11.7%)

12 (15.8%)
35 (46.1%)
18 (23.7%)
11 (14.5%)

404 (12.6%)
1,354 (42.2%)
956 (29.8%)
495 (15.4%)
Cigarette Smoker
 Current
 Past
 Never

341 (18.6%)***
773 (42.1%)
723 (39.4%)

53 (3.7%)
141 (9.7%)
1,253 (86.6%)

5 (6.6%)
21 (27.6%)
50 (65.8%)

389 (12.1%)
893 (27.8%)
1,926 (60.0%)
Cigarette Pack-years 24.3 ± 32.0*** 5.0 ± 18.0 9.3 ± 17.8** 16.0 ± 28.6
Depressive symptoms (Screening question “Do you suffer from depression?”) 417 (22.7%)*** 428 (29.7%) 28 (36.8%)* 817 (25.5%)
Use of an antidepressant medication 27 (1.5%)** 41 (2.8%) 3 (3.9%) 65 (2.0%)
Community
 Las Margaritas
 Lista
 Arévalo

622 (33.8%)***
726 (39.5%)
490 (26.7%)

497 (34.3%)
369 (25.5%)
581 (40.2%)

38 (50.0%)**
14 (18.4%)
24 (31.6%)

1,081 (33.7%)
1,081 (33.7%)
1,047 (32.6%)
Baseline Drink-years mean ± SD, (median) 61.9 ± 70.6 (26.3)a 56.7 ± 71.0 (16.8)
Baseline Drink-years by smoking strata
 Non-smokers
 Cigarette pack-year tertile 1
 Cigarette pack-year tertile 2
 Cigarette pack-year tertile 3

34.5 ± 51.1 (0.0)
94.9 ± 49.2 (98.0)
112.0 ± 93.2 (114.0)
175.5 ± 43.2 (156.0)*a

31.7 ± 55.8 (0.0)
80.4 ± 69.9 (78.0)
91.8 ± 73.0 (104.0)
110.0 ± 77.9 (116.0)
*

p< 0.05

**

p < 0.01

***

p < 0.001 (ethanol drinkers vs. non-drinkers; incident ET cases vs. control subjects).

a

Mann Whitney test