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Table 2 Comparison of baseline characteristics of older adults with and without anemia

From: High anemia prevalence in Korean older adults, an advent healthcare problem: 2007–2016 KNHANES

Variable

Older adults without anemia

Older adults with anemia

P-Value

(n = 4,444,812.928)c

(n = 699,077.287)c

Mean age, years

71.96 ± 0.06

74.00 ± 0.15

< 0.001a

Women, %

55.1 ± 0.5

61.8 ± 1.3

< 0.001b

Mean Hb level (SE)

14.00 ± 0.01

11.48 ± 0.03

< 0.001b

Underweight (BMI < 18 kg/m2), %

2.0 ± 0.2

4.5 ± 0.6

< 0.001b

Social allowance, %

10.6 ± 0.4

13.5 ± 1.0

0.002b

Low household income, %

48.5 ± 0.7

50.4 ± 1.4

0.200b

Food insecurity

2.0 ± 0.2

2.2 ± 0.4

0.626b

Live alone, %

15.8 ± 0.4

19.0 ± 1.0

0.001b

Condition, %

 Hypertension

62.3 ± 0.6

65.3 ± 1.3

0.034b

 Osteoarthritis

30.0 ± 0.5

33.7 ± 1.4

0.010b

 Rheumatoid arthritis

3.8 ± 0.2

6.1 ± 0.6

< 0.001b

 DM

22.5 ± 0.5

30.7 ± 1.4

< 0.001b

 Asthma

5.6 ± 0.3

5.1 ± 0.6

0.406b

 Pulmonary tuberculosis

0.2 ± 0.1

0.2 ± 0.1

0.578b

 Cancer, current

1.9 ± 0.2

4.4 ± 0.6

< 0.001b

 Hepatitis B

1.3 ± 0.1

0.9 ± 0.2

0.156 b

 Hepatitis C

0.3 ± 0.0

0.2 ± 0.1

0.669 b

 Liver cirrhosis

0.6 ± 0.1

0.7 ± 0.2

0.701b

 CRF

14.2 ± 0.5

34.0 ± 1.2

< 0.001b

  1. Values are expressed as either percentage ± standard error (SE) of the percentage or mean ± SE
  2. Abbreviations: Hb hemoglobin, BMI body mass index, DM Diabetes mellitus, CRF Chronic renal failure
  3. aP-values were derived from the independent t-test
  4. bP-values were derived from the chi-square test
  5. cWeighted population