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. Author manuscript; available in PMC: 2011 May 31.
Published in final edited form as: Chronobiol Int. 2011 Apr;28(3):258–266. doi: 10.3109/07420528.2011.553016

Table 1.

Baseline characteristics of 2968 men according to CVD event status

CVD Event
(N=490)
No CVD event
(2478)
P-value
Age group (yrs),% <.001
 64–69 5 9
 70–74 29 36
 75–79 31 28
 80+ 34 26
Caucasian,%* 92 89 .059
Education,%* .002
 Less than high school 7 5
 High School 21 15
 Some college or beyond 73 80
Smoking status,% .064
 Current smoker 2 2
 Former smoker 63 58
 Never smoked 35 40
Alcohol use,% .569
 <1 drink/wk 49 47
 1–13 drinks/wk 47 48
 14+ drinks/wk 5 6
Self-reported good or excellent health status,% 80 88 <.001
Living alone,% 15 13 .311
Caffeine use, mg/day, median (IQR) 172 (36–356) 180 (36–368) .927
IADL impairments,% <.001
 None 71 81
 1–2 20 16
 3+ 9 3
BMI, kg/m2, mean ± SD 27.6 ± 4.1 27.1 ± 3.8 .014
Waist-to-hip ratio, mean ± SD 0.974 ± 0.061 0.967 ± 0.063 .013
3MS Score, 0–100, median (IQR) 94 (89–97) 94 (91–97) .002
Depressed (GDS665 ≥ 6),% 8 6 .145
Use of antidepressants,% 11 7 .002
Use of benzodiazepines,% 6 4 .182
Use of non-benzodiazepine anxiolytic/hypnotics,% 2 2 .928
Walks regularly for exercise,% 45 47 .311
Diabetic,% 20 12 <.001
Systolic Blood Pressure mmHg, mean ± SD 129 ± 18 126 ± 16 <.001
Use of Hypotensive agents,% 7 4 .008
Total Cholesterol, mg/dl, mean ± SD* 189 ± 34 195 ± 34 <.001
HDL, mg/dl, median (IQR)* 45 (37–53) 47 (40–57) <.001
COPD/emphysema,% 22 16 .056
Parkinsons disease,% 11 17 .380
Apnea Hypopnea Index, median (IQR) 7.0 (3.5–12.9) 6.3 (2.9–12.7) .118
History of CVD,% 58 33 <.001
History of TIA or Stroke,% 18 9 <.001
History of PVD,% 17 8 <.001
Acrophase, mean ± SD 14:43 ± 1:27 14:42 ± 1:06 .660
Amplitude, mean ± SD 1.48 ± 0.67 1.56 ± 0.55 .004
Mesor, mean ± SD 2.65 ± 0.25 2.61 ± 0.26 .001
F-value, median (IQR) 1338 (872–1950) 1564 (1028–2162) <.001
Alpha, mean ± SD −0.43 ± 0.24 −0.45 ± 0.20 .066
Beta, median (IQR) 13.6 (7.7–27.9) 13.8 (7.8–27.0) .808
Minimum, mean ± SD 1.91 ± 0.51 1.82 ± 0.50 <.001

SD = Standard Deviation; IQR = Interquartile range; IADL = Instrumental Activities of Daily Living; BMI = Body Mass Index; 3MS = Teng-Modified Mini-Mental Examination Score; GDS = Geriatric Depression Scale; CVD = Cardiovascular Disease; TIA = Transient Ischemic Attack; PVD = Peripheral Vascular Disease.

*

Measurements obtained at baseline study visit an average of 3.2 yrs earlier.

Measurement obtained at interim study visit an average of 1.4 yrs earlier.

Kruskall-wallis test used to calculate p-value.