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

BMC Geriatrics

Table 1 Comparison of baseline characteristics of patients with and without laboratory data

Variable	Older adults with laboratory data	Older adults without laboratory data	P-Value
Variable	(n = 5,143,890.215)^c	(n = 830,027.379)^c	P-Value
Mean age, years	72.24 ± 0.06	76.02 ± 0.17	< 0.001^a
Women, %	56.0 ± 0.5	65.9 ± 1.3	< 0.001^b
Underweight (BMI < 18), %	2.3 ± 0.2	5.8 ± 0.7	< 0.001^b
Social allowance, %	11.0 ± 0.4	15.0 ± 1.0	< 0.001^b
Low household income, %	48.8 ± 0.7	57.5 ± 1.5	< 0.001^b
Food insecurity	2.1 ± 0.2	2.9 ± 0.4	0.034^b
Live alone, %	16.2 ± 0.4	21.2 ± 1.1	< 0.001^b
Condition, %
Hypertension	62.7 ± 0.5	65.1 ± 1.5	0.130^b
Osteoarthritis	30.5 ± 0.5	30.6 ± 1.4	0.913^b
Rheumatoid arthritis	4.1 ± 0.2	4.1 ± 0.6	0.936^b
DM	23.6 ± 0.5	88.7 ± 1.8	< 0.001^b
CVD	6.1 ± 0.2	7.9 ± 0.9	0.034^b
Asthma	5.5 ± 0.3	6.2 ± 0.8	0.367^b
Pulmonary tuberculosis	0.2 ± 0.0	0.4 ± 0.2	0.259^b
Stroke	4.3 ± 0.2	6.0 ± 0.7	0.007^b
Cancer, current	2.2 ± 0.2	6.4 ± 0.7	< 0.001^b
Hepatitis B	1.2 ± 0.1	0.8 ± 0.2	0.145^b
Hepatitis C	0.2 ± 0.0	0.6 ± 0.2	0.014^b
Liver cirrhosis	0.6 ± 0.1	0.4 ± 0.2	0.359^b
CRF	16.9 ± 0.4	31.8 ± 5.2	< 0.001^b

Values are expressed as either percentage ± standard error (SE) of the percentage or mean ± SE
Abbreviations: BMI body mass index, DM Diabetes mellitus, CVD Cardiovascular disease, CRF Chronic renal failure
^aP-values were derived from the independent t-test
^bP-values were derived from the chi-squared test
^cWeighted population

ISSN: 1471-2318