[Nutritional status and energy expenditure in elders of differing socioeconomic level]

Income and socioeconomic status can influence nutritional status of individuals. Since elders are a more vulnerable group to nutritional deficiencies, socioeconomic status could have a special relevance on nutrition of elderly people.

To assess the influence of socioeconomic status on the nutritional status of elders.

Elders of both sexes of high socioeconomic level and age and sex matched elders of low socioeconomic status were studied. Anthropometry, body composition using double beam X ray absorptiometry, resting energy expenditure using an open circuit indirect calorimeter, routine biochemistry, blood levels of folic acid, vitamin B12 and homocysteine were measured in all subjects.

Fourteen female elders of high socioeconomic level, 14 females of low level and 12 males of each level were studied. Mean age of females and males was 71.5 +/- 3.7 and 73.9 +/- 4.2 years old respectively. Males and females of high socioeconomic status were taller than their counterparts of low status. Females of high socioeconomic status had a lower body mass index than their pairs of low status (26.3 +/- 3.8 and 30.2 +/- 5.6 kg/m2 respectively p < 0.02). Men of high economic status had a higher fat mass than their pairs of low level (20.3 +/- 3.5 and 15.1 +/- 5.5 kg respectively, p < 0.005). No differences in resting energy expenditure in women of differing socioeconomic level were observed. Men of high level had a higher energy expenditure that their counterparts of low level (36.0 +/- 4.9 and 32.8 +/- 2.2 Kcal/kg lean body mass/day respectively, p < 0.02). Low level male elders had higher serum total cholesterol and triglycerides. Folic acid, vitamin B12 and homocysteine levels were within normal limits. Dietary intake showed deficiencies in calorie, protein and vitamin intake in all subjects.

In this group of elders, low socioeconomic level did not produce a significant impact on nutritional status.