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Biomedical subjects

Z Rubin

Publications and source records attributed to Z Rubin.

12 recordsLinked to original sources
PubMed1994

Epidemiology of hip fractures in an urban population of central Argentina.

The epidemiology of fractures of the proximal femur was studied over a 1-year period in the city of La Plata, Argentina (population 288,000, latitude 35 degrees S). One hundred and ninety-five patients (164 women and 31 men) aged 50 years or over suffered a fracture of the proximal femur. The median age was 80 years in women and 77 years in men. The incidence of hip fractures per 100,000 inhabitants aged 50 years or over was 379.4 in women and 100.9 in men (female/male ratio 3.76). The age-adjusted ratio was 2.90. In women the incidence increased from 11.3 in the sixth to 2807.3 in the ninth decade.

Age Distribution↗
PubMed1990

[Bone mineral density of the lumbar spine and proximal femur of normal females in Buenos Aires].

The bone mineral density (BMD) of the lumbar spine and proximal femur was determined in 170 and 131 respectively normal females from 20 to 79 years of age. The BMD was determined by dual photon absorptiometry with a Lunar DP3 equipment. The results per decade of age are shown on table 2. The percentage fall between the 3rd and 8th decades of age at different skeletal sites is summarized on table 3. Meanwhile the bone loss at the lumbar spine and mid-radius from a previous study was approximately 3% before the menopause, the BMD of proximal femur diminished approximately 14% over the neck and 19% at the Ward's triangle during the same period. From age 50 to 80 the average bone loss was similar at the spine and femoral neck (approximately 15%) but it was more severe at the Ward's triangle (approximately 24%). The results obtained in the Buenos Aires females were compared to the values observed in studies performed in United States and Australia using the same equipment. No differences were found among the three populations using the Bonferroni's analysis for multiple comparisons. The BMD appears to be similar in different caucasian populations when the same type of equipment is used, but the values cannot be compared with the results obtained with other equipment. A sustained diminution of the proximal femur BMD was observed from age 20 to 80, whereas over the spine a distinct difference before and after the menopause was found.

Absorptiometry, Photon↗
PubMed1982

Cutaneous neuroma.

Explore the source record for details and available documents.

Diagnosis, Differential↗
PubMed1978

Friendship, proximity, and self-disclosure.

Patterns of self-disclosure were explored by means of a questionnaire administered to pairs of roommates and hallmates (non-roommates living on the same floor) in freshman dormitories. It was predicted and found that friendship was more highly related to self-disclosure in intimate than in non-intimate topic areas, whereas proximity was more highly related to disclosure in non-intimate than in intimate areas. It was also found that friendship and intimate disclosure were more highly related among women than among men. These findings emphasize the interplay of personal, role-related, and environmental factors which underlie patterns of friendship and self-disclosure. They also point to the importance of viewing self-disclosure in differentiated terms, rather than as single monolithic entity. Other findings of both substantive and methodological interest are reported. For example, there was a strong tendency for respondents to overemphasize the degree to which their patterns of giving and receiving personal information were symmetrical. There was also a tendency for respondents to report giving more disclosure than they received in non-intimate areas, but not in intimate areas.

Analysis of Variance↗
PubMedDate not supplied

Osteoporosis with vertebral fractures associated with pregnancy and lactation.

Three cases of young women who developed severe vertebral osteoporosis after pregnancy and during lactation are described. These patients shared several features: a low-calcium diet during most of their lives, very-low body weight in two patients, and a positive family history of osteoporosis in two patients. Initial studies disclosed vertebral fractures, severely diminished bone mineral density of the spine (Z score = -3.3 to -4.1), and a less severely affected bone mineral density of the hip (Z score = -1.6 to -2.3). During the prolonged follow-up of these patients, treated with oral biphosphonates, vitamin D, and calcium, an improved clinical response with a marked recovery of spine bone mineral density was observed. Poor general nutrition, low calcium intake, and a positive family history of osteoporosis appear to be strong risk factors for pregnancy- and lactation-associated osteoporosis. Although the mechanism of action is uncertain, calcium, vitamin D, and antiresorptive agents may have been beneficial in the treatment of this severe disorder.

Adult↗