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Table 1 Characteristics of participants across three repeated measurements

From: Reproducibility of serum cytokines in an elderly population

Characteristics

The 1st measurement

The 2nd measurement

The 3rd measurement

Sample size

65

65

65

Age (years), mean (SD)

77.89 (6.14)

82.50 (4.85)

84.43 (4.85)

 65–75, n (%)

23 (35.38%)

5 (7.69)

2 (3.08)

 75–80, n (%)

19 (29.23%)

13 (20.00)

9 (13.85)

  ≥ 80, n (%)

23 (35.38%)

47 (72.31)

54 (83.08)

Gender, n (%)

 Male

32 (49.23)

32 (49.23)

32 (49.23)

 Female

33 (50.77)

33 (50.77)

33 (50.77)

Race/ethnicity, n (%)

 White

22 (33.85)

22 (33.85)

22 (33.85)

 Black

21 (32.31)

21 (32.31)

21 (32.31)

 Hispanic

22 (33.85)

22 (33.85)

22 (33.85)

Education duration (years), mean (SD)

12.26 (4.95)

12.26 (4.95)

12.26 (4.95)

BMI categories, n (%) a

 Normal

14 (26.42)

14 (25.45)

16 (29.09)

 Overweight

19 (35.85)

20 (36.36)

22 (40.00)

 Obese

20 (37.74)

21 (38.18)

17 (30.91)

Time of day of blood collection, n (%) a

 Ante meridiem

29 (58.00)

37 (57.81)

43 (66.15)

 Post meridiem

21 (42.00)

27 (42.19)

22 (33.85)

WHICAP wave, n (%)

 The second wave (1999 cohort)

36 (55.38)

36 (55.38)

36 (55.38)

 The third wave (2009 cohort)

29 (44.62)

29 (44.62)

29 (44.62)

Baseline hypertension, n (%)

 No

5 (7.69)

–

–

 Yes

60 (92.31)

–

–

Baseline diabetes, n (%)

 No

46 (70.77)

–

–

 Yes

19 (29.23)

–

–

Baseline cardiovascular diseases, n (%)

 No

28 (43.08)

–

–

 Yes

37 (56.92)

–

–

  1. SD standard deviance, n number of subjects, % proportion, BMI body mass index, WHICAP Washington Heights-Inwood Community Aging Project.
  2. aSum of frequency of some characteristics was less than 65 at specific measurement due to missing data