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Table 1 Baseline characteristics of the study subjectsa

From: Dynamics and interactions of cobalamin and folate status during advanced aging – a longitudinal study in a community-dwelling cohort with multiple follow-ups

 

Total (n = 332)

Women (n = 233)

Men (n = 99)

Pb

Serum cobalamin (pmol/L)

266.8 (207.6, 376.8)

272.4 (216.3, 382.2)

248.7 (186.9, 356.0)

0.036

Serum folate (nmol/L)

19.0 (15.0, 23.8)

19.2 (15.1, 24.9)

18.3 (14.3, 22.3)

0.133

Age (years)

68 (64, 71)

68 (63, 72)

67 (64, 70)

0.526

Body mass index (kg/m2)

26.2 (24.1, 28.6)

26.3 (23.9, 28.7)

26.1 (24.6, 28.6)

0.840

Fat mass (kg)

26.4 (22.1, 32.5)

28.2 (23.4, 34.1)

22.9 (19.0, 28.4)

< 0.001

Fat-free mass (kg)

41.7 (38.7, 51.9)

39.6 (37.8, 42.3)

54.8 (52.7, 58.5)

< 0.001

Fat-free mass (%)

61.6 (56.3, 67.6)

58.4 (54.8, 62.4)

70.5 (66.7, 74.1)

< 0.001

Energy intake (kcal/d)

2012 (1676, 2369)

1919 (1607, 2248)

2262 (1895, 2609)

< 0.001

Cobalamin intake (μg/d)

5.3 (4.0, 7.1)

5.1 (3.8, 6.9)

5.7 (4.6, 7.6)

0.009

Folate intake (μg/d)

236.0 (194.6, 290.1)

235.3 (186.3, 288.8)

248.1 (200.3, 304.8)

0.153

Alcohol intake (g/d)

3.7 (0.3, 11.2)

3.3 (0.3, 7.6)

11.2 (0.4, 20.0)

< 0.001

Serum creatinine (mg/dL) c

0.9 (0.9, 1.0)

0.9 (0.9, 1.0)

1.0 (0.9, 1.1)

0.131

Vitamin B/multi-vitamin supplement users

106 (31.9)

78 (33.5)

28 (28.3)

0.424

Current/ex-smokers

135 (40.7)

62 (26.6)

73 (73.7)

< 0.001

  1. aMetric variables are expressed as median and 25 and 75% quartile, whereas categorical variables are expressed as absolute and relative frequencies
  2. bP values for comparison between sexes by Wilcoxon-Mann-Whitney test and Chi-squared test
  3. cIn the baseline data set, only 58 subjects (47 females and 11 males) had serum creatinine measurements, because serum creatinine was first measured in 2002 and the majority of the subjects entered the study before 2002