Jill Porthouse

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OBJECTIVE To assess whether supplementation with calcium and cholecaliferol (vitamin D3) reduces the risk of fracture in women with one or more risk factors for fracture of the hip. DESIGN Pragmatic open randomised controlled trial. SETTING Practice nurse led clinics in primary care. PARTICIPANTS 3314 women aged 70 and over with one or more risk(More)
Objective: To asess whether hip protectors used among women living in the community in the United Kingdom and at high risk of hip fracture, lead to a reduction in hip fracture. Design: Pragmatic randomized controlled trial (RCT). Setting: Primary care with participants being recruited largely from general practitioners’ patient lists. Participants: Women(More)
BACKGROUND Common clinical risk factors for fracture in older women have been identified. To date, most of these risk factors have not been confirmed in a UK population. AIM To confirm the important risk factors for fracture in older women. DESIGN Comprehensive cohort study (CCS) with a nested randomized controlled trial. METHODS The CCS included 4292(More)
Objective To assess whether supplementation with calcium and cholecaliferol (vitamin D3) reduces the risk of fracture in women with one or more risk factors for fracture of the hip. Design Pragmatic open randomised controlled trial. Setting Practice nurse led clinics in primary care. Participants 3314 women aged 70 and over with one or more risk factors for(More)
Objective To assess whether supplementation with calcium and cholecaliferol (vitamin D3) reduces the risk of fracture in women with one or more risk factors for fracture of the hip. Design Pragmatic open randomised controlled trial. Setting Practice nurse led clinics in primary care. Participants 3314 women aged 70 and over with one or more risk factors for(More)
BACKGROUND Seasonal Affective Disorder (SAD) is a sub-type of depression that only occurs during the winter months. A reduction in vitamin D may be linked to SAD. Since vitamin D deficiency has been reported to be common in older people, vitamin D supplementation may be expected to reduce seasonal mood disturbance in this group. OBJECTIVE To assess the(More)
OBJECTIVES Low response rates to postal questionnaires can threaten the validity of studies by reducing the effective sample size and introducing bias. The identification of methods with which to optimise response rates could, therefore, improve the quality of studies. In an attempt to identify such methods, we undertook a randomised trial of two simple(More)
Dear editor, The cost effectiveness analysis of hip protectors reported by Waldegger et al. [1] is heavily influenced by the use of a systematic review of hip protectors undertaken by the authors. The review has a number of shortcomings. First, the review is outdated. The search strategy was completed in May 2001, making the review nearly 2 years old.(More)
The impact of adding phosphogypsum (PG) to freshwater wetland areas, and potential effect on methane production and respiration in sediment was studied in the laboratory. Two organic matter levels (native and enriched with 0.5% by weight ground dry plant material) were studied using five sediment treatments each: (1) no PG added, (2) 4% PG by dry weight(More)