Table 1

Percentages or Means and Standard Deviations of the Variables

Independent Variables

Percentage

Mean

Standard

Deviation


Baseline Cognition

Telephone Interview for Cognitive Status (TICS-7; 0-15 correct)

12.9

2.1

Immediate Word Recall (0-10 correct)

4.0

1.8

Delayed Word Recall (0-10 correct)

2.6

2.0

Exposure and Censoring

Years Between Interviews

7.2

4.1

Entered Managed Care After Baseline

15.5

Survived to the End of the Studya

35.1

Died ≤ 1 Year After the Last Interviewa

18.9

Demographic and Socioeconomic

Age

77.7

5.3

Men

36.9

African Americanb

8.7

Hispanic Americanb

3.2

Widowedc

39.4

Divorced or Separatedc

5.0

Never Marriedc

3.2

Grade School Onlyd

21.6

Attended Colleged

29.8

Lowest Income Quintilee

13.1

Highest Income Quintilee

26.5

Disease History and Comorbidity

Acute Myocardial Infarction

6.1

Angina

7.9

Arthritis

24.8

Cancer

12.2

Diabetes

10.9

Hip Fracture

3.9

Hypertension

44.2

Lung Conditions

7.6

Psychological Conditions

6.2

Stroke

7.2

Comorbidity (≥ 3 of the above diseases)

16.7

Health Lifetyles

Obesef

14.2

Underweightf

2.5

Engages in Vigorous Exercise (≥ 3 times per week)

33.0

Current Cigarette Smokerg

9.4

Former Cigarette Smokerg

42.6

≥1 Alcoholic Drink Daily

11.6

Functional Status

Activities of Daily Living Limitations (0-5)

0.25

0.69

Instrumental ADL Limitations (0-5)

0.21

0.63

Mobility Limitations (0-4)

1.13

1.42

Good Vision

77.4

Good Hearing

76.8

Depressive Symptoms

1.5

1.9

Continuity of Care

Every Day After Baselineh

9.2

Never After Baselineh

26.7

Post-Baseline Health Shocks

Quartile 1 of Annual Primary Care Visitsi

25.0

Quartile 2 of Annual Primary Care Visitsi

25.0

Quartile 3 of Annual Primary Care Visitsi

25.0

Quartile 1 of Annual Hospital Episodesj

27.9

Quartile 2 of Annual Hospital Episodesj

24.7

Quartile 3 of Annual Hospital Episodesj

22.5


aReference category is died > 1 year after the last follow-up interview.

bReference category is White.

cReference category is married.

dReference category is high school.

eReference category is the three middle quintiles.

fReference category is normal or overweight.

gReference category is never having smoked cigarettes.

hReference category is continuity of care for 1-99%.

iReference category is top quartile of primary care visits.

jReference category is top quartile of annual hospital episodes.

Wolinsky et al. BMC Public Health 2011 11:710   doi:10.1186/1471-2458-11-710

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