Association of hemoglobin concentration with handgrip strength in relation to hepatocyte growth factor levels among elderly Japanese men aged 60-69 years: a cross-sectional study

Relationship between Selected Functional Performance Parameters and the Occurrence of Anaemia in Hospitalized Females and Males Aged 80 and More

Anaemia is considered a factor that significantly increases the risk of disability and mortality in the elderly. Among the hospitalized elderly, the incidence of anaemia is higher than in the general population, which necessitates extensive diagnostics for anaemia in this group. The aim was to assess the relationship between the occurrence of anaemia in hospitalized females and males, aged 80 years and more, and selected determinants of motor fitness. The analysis covered 91 females and 57 males aged 80 and more. The study implemented haemoglobin level, handgrip strength, a lower limb strength, mobility and balance measurement. The analysis used the logistic regression model and the cut-off point was determined by ROC curve. A 1 kg increase in muscle strength reduced the risk of anaemia in a group of males by 12%. The value of handgrip strength from which anaemia can be predicted in a group of males is 24.4 kg. In the female group, no statistically significant correlations were found. There is a need to continue research in this area with the participation of a larger group of respondents to look for potential factors that may be related to anaemia, in order to find non-invasive diagnostic tools useful for elderly people.

The "Iron Tale"- iron indices and handgrip strength in community-dwelling adults

Sarcopenia is a precursor for physical frailty and is associated with adverse outcomes. Low handgrip strength (HGS) is one of the diagnostic criteria for sarcopenia. Multiple factors can influence muscle quality, including muscle composition, architecture, fat infiltration, fibrosis, excessive iron deposition, and neural activation. There is limited evidence on the association of iron and HGS in community-dwelling older adults. We aim to examine the association of HGS with iron indices and inflammation. The Healthy Older People Everyday study is a subset of the Singapore Population Health Studies cohort. Complete cross-sectional data and iron indices were available for 477 participants. Sociodemographics, comorbidities, and final scores of the FRAIL scale, Barthel Index, Lawton Scale, HGS, and timed-up-and-go were collected and analyzed. Laboratory parameters including hemoglobin, hsCRP and iron indices were measured. The mean age of the participants was 70.9 ± 5.0 years, 258(54.1%) were females, and most were of Chinese(85.3%) ethnicity. Amongst the participants, 6.9% were frail, 39.4% were pre-frailt, and 53.7% were robust. Mean HGS was 22.2 ± 7.0 kg. Low HGS was prevalent in 47.8%, the highest amongst Indians. Prevalence of diabetes, chronic kidney disease, and ischaemic heart disease were significantly higher in those with low HGS. In multivariate regression adjusting for age, sex, comorbidities and Hb, ferritin (β = 0.004 95%CI 0.0002-0.007, p = 0.04), transferrin saturation (β = 0.06 95%CI 0.01-0.10, p = 0.02) and hsCRP (β = - 0.15 95%CI - 0.26 to - 0.04, p < 0.01) were significantly associated with HGS. CRP was negatively associated with HGS, whereas ferritin and transferrin saturation were positively associated with HGS. Older people with iron deficiency should be assessed for sarcopenia, and vice versa, as both can occur in multisystemic disorder, and need to be managed concurrently. Prospective longitudinal studies and clinical trials may be required to establish the causal effect of iron deficiency on muscle strength and sarcopenia and the benefits of iron therapy to improve function and quality of life.

Association between anemia and dynapenia in older adults: a population-based study

BACKGROUND

Few reports have been issued on the relationship between anemia and dynapenia in older people.

AIM

This study aimed to assess the independent association between anemia and dynapenia in older adults.

METHODS

This study was based on an analysis of the Korea National Health and Nutrition Examination Survey database (2015-2018). A total of 4812 subjects aged ≥ 65 years were included. Dynapenia was defined by a handgrip strength (HGS). The independent association between dynapenia and anemia was examined by complex-sample multivariable logistic regression analyses.

RESULTS

The geometric mean serum hemoglobin level for all study subjects was 13.73 g/dL, and the prevalence of anemia was 13.1% (men, 12.8%; women 13.4%). Anemic subjects had a significantly lower adjusted mean HGS than non-anemic controls (23.14 ± 0.45 kg vs. 24.50 ± 0.38 kg, P < 0.001). Furthermore, anemic subjects had a significantly higher odds ratio for dynapenia (OR, 1.68; 95% CI, 1.30-2.17) than subjects without anemia after adjusting for multiple confounders, and the odds ratio of dynapenia was higher for anemic men (OR, 2.06, 95% CI, 1.38-3.09).

CONCLUSION

This study indicates anemia is independently associated with dynapenia in older Koreans, especially in men, and indicates that dynapenia screening is needed in older people with anemia.