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Biomedical subjects

R K Neff

Publications and source records attributed to R K Neff.

27 records · Page 2Linked to original sources
PubMed1978

Hypertension-hypotension in pregnancy. Correlation with fetal outcome.

Data from 38,636 pregnant women were studied to determine the best criteria for diagnosing pregnancy hypertension based on the constellation of clinical factors yielding poorest perinatal and long-term results to the offspring. It was found that the combination of maximum diastolic blood pressure and maximum proteinuria, as observed during the interval 28 weeks to term, provided the closest correlation with outcome. This information offered an objective means for establishing a classification of hypertension-hypotension in late pregnancy.

Blood Pressure↗
PubMed1978

Clinical estimation of liver span in infants and children.

The liver span in 350 infants and children was determined by percussion of the upper and lower borders in the midclavicular line. Mean liver span was found to be related to age curvilinearly and ranged from a minimum of 1.9 cm at 1 week of age to a maximum of 7.7 cm in males and 6.3 cm in females at 20 years of age. In children with normal growth patterns, age and sex were found to be the major factors influencing liver size. Though height and weight also correlated with liver span, these variables did not add substantially to the correlation using age and sex alone. The presence of minor systemic illnesses, eg, otitis and gastroenteritis, did not affect liver span. The expected normal values for liver span at different ages for male and female children have been established and provide the basis for comparison during routine physical examination.

Adolescent↗
PubMed1976

Association between maternal diabetes and the respiratory-distress syndrome in the newborn.

Perinatal data on 805 infants of diabetic mothers and 10,152 infants of nondiabetic mothers were examined for a relation between maternal diabetes and respiratory-distress syndrome of the newborn. The syndrome occurred in 23.4 per cent of the diabetic vs. 1.3 per cent of the nondiabetic group. The risk of the syndrome in an infant of a diabetic mother was 23.7 times greater than that for an infant of a nondiabetic mother (P less than 0.00001). Further analysis to control for features associated with diabetes but also in themselves risk factors, such as gestational age and route of delivery, showed that respiratory-distress syndrome in infants of diabetic mothers was 5.6 times as likely to develop as in infants of nondiabetic mothers (P less than 0.00001). Thus, maternal diabetes mellitus per se predisposes to newborn respiratory-distress syndrome.

Adult↗
PubMed1976

Cigarette-smoking and nonfatal myocardial infarction: rate ratio in relation to age, sex and predisposing conditions.

The relationship of cigarette-smoking and nonfatal myocardial infarction (AMI) was evaluated using the case-control approach. Overall, the association was present for smokers of one and two packs per day, the standardized rate-ratio estimates being 1.5 and 1.7, respectively. The association was strongest in those who had a low risk score for AMI and particularly strong for people in the earliest (fifth) decade of age. People with diabetes and/or angina manifested no association between cigarette-smoking and AMI.

Adult↗
PubMed1976

Alcohol consumption and nonfatal myocardial infarction.

A study of the relathonship between alcohol consumption and nonfatal myocardial infarction, involving 399 cases and 2486 reference subjects, indicated absence of any major overall association (rate ratio point estimate of 0.9 with 95% confidence limits of 0.6 and 1.2), but there was some evidence of a lower rate in subjects consuming six or more drinks per day (rate ratio point estimate of 0.6 with 95% confidence limits of 0.3 and 1.1). Confounding by several potential confounders was controlled by stratification according to a confounder-summarizing score.

Adult↗
PubMed1976

Pregnancy, outcome as related to hypertension, edema, and proteinuria.

Clinical variables of blood pressure, proteinuria, edema, and maternal weight have been studied extensively, with particular reference to associated adverse fetal and infant outcomes. The levels of these variables, as well as their relative patterns of change with advancing pregnancy, were investigated by several analytic methods. It was determined that diastolic blood pressure and proteinuria, alone and in combination, profect on fetal and infant outcomes to enable us to create an empirical classification of gravidas whose fetuses were probably at risk. The results must be considered preliminary in view of the fact that the work is still in progress.

Blood Pressure↗