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Biomedical subjects

L A Ray

Publications and source records attributed to L A Ray.

8 recordsLinked to original sources

Predictors of smoking among Mexican-Americans: findings from the Hispanic HANES.

BACKGROUND: This report presents findings from the Hispanic HANES on patterns and predictors of smoking in the Mexican-American subsample. Data are drawn from men and women ages 20-74 years who were administered the Adult Sample Person Questionnaire (N = 3,464). METHODS: Four smoking variables (current, ever, former, and daily consumption) are analyzed in relation to sociodemographic measures, including gender, age, marital status, employment status, occupational prestige, income, acculturation, co-workers' smoking, and presence of others in the home who smoke. All analyses were conducted separately for young, middle-age, and older age groups and for males and females. Multiple logistic and multiple regression analyses were performed, controlling for sociodemographic factors, to identify predictors of smoking. RESULTS: The most important factors found to be associated with smoking were the presence of other smokers in the immediate social environment (home and workplace) and the degree of acculturation (particularly among women). Associations with age, income, and marital status were inconsistent across age and gender groups. With minor exceptions, education, employment, and occupational prestige were unrelated to smoking. CONCLUSIONS: These findings support interventions on the basis of age categories, differential acculturation, and social influence, but overall the findings are more striking for their similarity to predictors of smoking in the general population than for their differences.

Adult

Hearing loss and hearing aid use in Hispanic adults: results from the Hispanic Health and Nutrition Examination Survey.

Data from the Hispanic Health and Nutrition Examination Survey were employed to investigate the prevalence of hearing loss and hearing aid use in Mexican-American, Cuban-American, and Puerto Rican adults. Hearing loss was 6 to 14 times more prevalent in older (ages 54 to 74) vs younger (ages 20 through 34) subjects. Cuban Americans and Mexican Americans tended to have a similar prevalence of hearing loss, whereas Puerto Ricans had markedly lower rates. Mexican-American men had higher rates of hearing loss than Mexican-American women. The prevalence of hearing aid use among hearing-impaired individuals ranged from 2% to 11%. Implications for future research are discussed.

Adult

Change in subjective age among the elderly: an eight-year longitudinal study.

Changes in subjective age were investigated with a sample of older Mexican Americans and Anglos over an 8-year period (1976-1984). It was found that people who changed from youthful ("young" or "middle-aged") to old ("old" or "very old") subjective ages were significantly different than persons retaining youthful subjective ages on several factors: they were chronologically older, were more likely to be Mexican Americans, and had reported declines in their self-assessed health. These were the exact same differences observed cross-sectionally which renews faith in cross-sectional data in this area. A few people reversed their subjective ages (from old to youthful) over time, but we found no evidence that they had experienced improvements in their health or social situation.

Aged

Smoking among Mexican Americans: a three-generation study.

Smoking behavior was investigated with data from a three-generation study of Mexican Americans in San Antonio, Texas. Rates of smoking among the men were found to be higher than rates for other White men obtained in previous studies, while rates for women were slightly lower than those reported for other White women. However, the percentage of light smokers was considerably higher among Mexican Americans than among other groups. There was no evidence that acculturation was a consistent predictor of greater likelihood of smoking. However, there was evidence that the smoking behavior of younger Mexican Americans, particularly the women, was associated with the smoking behavior of their parents.

Adolescent

Sources of helping and intergenerational solidarity: a three-generations study of Mexican Americans.

Sources of help and advice (other than one's spouse) and degree of intergenerational solidarity were investigated in a three-generation sample of Mexican Americans. It was found that elderly Mexican Americans are involved in strong helping networks with their children who rely a great deal on them for advice and help. In all three generations, there is a predominance of family as sources of support. Women are relied on for help regarding health matters and men regarding home repairs and upkeep. Help and advice regarding financial problems and personal problems fall primarily along same-sex lines. Scales measuring intergenerational solidarity, showed that all-female dyads have greater associational solidarity than all-male and cross-sex dyads. Few differences appear in affectual solidarity which was uniformly high. Finally, there appears to be minimum association and intergenerational helping between grandparents and grandchildren.

Adolescent

Determinants of physician utilization among Mexican-Americans. A three-generations study.

Determinants of physician utilization were examined using a three-generational sample of Mexican-Americans in San Antonio. A typical version of Andersen's causal behavioral model was moderately successful in predicting physician utilization in the middle and older generations and less successful in the younger generation. Consistent with the literature, need factors (health indicators) tended to affect utilization most directly. The authors also examined whether acculturation into the larger society positively influenced utilization regardless of need, as the literature suggested. While three separate measures of acculturation had no independent effects on physician utilization, acculturation did affect utilization indirectly via the need variables in the middle generation, although these effects were not consistently in the direction of greater utilization. Generational differences in determinants of physician utilization are discussed particularly in relation to the model's greater relevance for the middle and older generations.

Acculturation

Adaptive predictive coding with applications to radiographs.

Picture archiving and communications systems (PACS) require storage and transmission of vast amounts of data. For design/cost considerations, it is desirable to reduce the size of these data without sacrificing the integrity of the stored information. The major considerations in designing a data-compression scheme for a PACS system are discussed: fidelity of the reconstructed image, bit rate, hardware complexity, and processing time. The basic principles of conventional nonadaptive differential pulse-code modulation (DPCM) are reviewed and compared with adaptive techniques. The effect of adaptive quantization on radiographic images is examined. Special consideration is given to block-adaptive DPCM or the "switched quantizer," which greatly enhances the system performance as compared with nonadaptive techniques, and conservatively has a 5:1 compression ratio. Sample radiographs substantiate the results.

Bone and Bones