Determinants of first prescription of hormone replacement therapy. A follow-up study among 1689 women aged 45-60 years

The aim of the present study was to ascertain the cumulative incidence of first hormone replacement therapy (HRT) and the factors that predict its prescription. In a general population 1689 women were followed for 9 months in order to trace first HRT prescriptions. Determinants (well-being, attitude towards menopause, menopausal status and another 9 variables) were measured by means of a questionnaire. Data analyses were performed for all women and for women with or without typical climacteric complaints. The cumulative 9 month incidence of HRT was 6.2%. For women without typical complaints a lower level of well-being (odds ratio 5.5; 95% Cl 1.9–15.5) and the former use of the contraceptive pill (odds ratio 4.6; 95% CI 1.0–20.5) were independently associated with HRT prescription. For women with typical complaints a positive attitude towards ‘menopause should be treated' (odds ratio 3.8; 95% Cl 1.8–8.0) was a determinant of HRT prescription. The cumulative incidence of HRT prescription is high, but from additional data it is apparent that within a period of 1 year and 9 months the majority of women stop taking HRT. For women without typical complaints, physicians prescribe HRT five times more often to those with a lower level of well-being. For women with typical complaints the physician's prescription is primarily related to the woman's attitude towards (medical) treatment of the menopause

Vasomotor symptoms and well-being in the climacteric years

Objectives: To determine more closely the relationship between vasomotor symptoms, well-being and climacteric status according to the last menstrual bleeding and according to the women themselves. Methods: A population-based cross-sectional study was executed using a postal questionnaire. Well-being of women with and without vasomotor symptoms was compared, for the different menopausal statuses. All 2729 women living in a commuter suburb of Rotterdam aged 45-60 years were approached of whom 1947 (71.3%) responded. Well-being was measured by the Inventory of Subjective Health (ISH) and three subscales of the Sickness Impact Profile (SIP). Results: The results showed that the relationship between vasomotor symptoms and well-being was dependent on climacteric status. Pre- and (middle and late) postmenopausal women with vasomotor symptoms more often experienced a relatively lower level of well- being compared to women without these symptoms. However, when the prevalence of vasomotor symptoms is as its peak, i.e. in late perimenopause, a difference in the level of well-being between women with and without vasomotor symptoms was absent. Conclusions: It is concluded that well-being and vasomotor symptoms were inversely related in all menopausal statuses except for the (late) perimenopausal phase. For this no somatic explanation seems plausible. A more social scientific explanation is suggested

Duration of hormonal replacement therapy in general practice; a follow- up study

Objectives: To assess the mean duration of use of HRT in general practice and to identify determinants of the duration of HRT use. Methods: A general population of 1689 women aged 45-60 years and enlisted in five group practices of general practitioners were followed for 9 months to trace first HRT prescriptions. All 103 women who were prescribed HRT were followed for a period of 2.25 years. Duration of HRT was assessed by using the data provided on the dispensing of HRT. Possible determinants of duration of use, such as attitude towards menopause, menopausal status and another six variables were measured by means of a questionnaire. Results: None of the 103 women received HRT for a preventive purpose; the main indication was menopausal complaints. More than 60% of the women stopped their HRT within 6 months and only 8% of the women remained on HRT for more than 2 years. The mean duration of use was 7 months. Determinants that significantly predicted the duration of HRT use were age, attitude towards treatment of the menopause and the group practice. Conclusions: The mean duration of HRT use is very short, despite the fact that the most prevalent indication is the alleviation of menopausal symptoms. Apparently, Dutch women are presently unwilling to take HRT for longer periods

Phase transitions in diglyceride monolayers studied by computer simulations, pressure-area isotherms and x-ray diffraction

1,2-sn-diglyceride monolayers exhibit unique and complex phase transitions as a function of surface pressure. The dynamical response of the layer on expanding the film has been investigated by computer simulations, (π-A) isotherms and grazing-incidence X-ray diffraction. Good agreement is found between the simulations and experiments. The Langmuir film undergoes two phase transitions occurring at 38.3 and 39.8 Å2/molecule. The transition at low surface density is associated with a tilt of ≈14° in the direction close to nearest neighbour. The first transition is unique for the diglyceride molecules and has not been observed for other amphiphilic molecules. It is driven by a competition of hydrophobic/hydrophilic and intra/intermolecular forces and can be pictured as a «seesaw» mechanism. Due to the close packing of the chains at high surface pressure, the sn-1 ester group aligns with the alkyl chain, and only the sn-2 ester group is favoured to lay at the aqueous interface. Hydrophilic forces attract the sn-1 ester group, but its motion towards the aqueous subphase is hindered by intra- and intermolecular chain interactions. On expansion, the intermolecular interaction decreases, and at the first transition, the intramolecular interaction between the two chains is strong enough to cause a «swelling» of the molecules. The diffraction pattern determined in the different mesophases reveals that the layer maintains its hexagonal structure up to the second phase. Concomitant with the tilt, the structure relaxed from a hexagonal to a distorted hexagonal lattice