Publications by authors named "Gerry B Hill"

Background: The recurrence of varicose veins is a common and costly consequence of varicose vein surgery. Despite the long history and vast experience of varicose vein surgery, the exact cause of recurrence is still unknown. This study aims to investigate the cause of recurrence further by correlating findings from duplex ultrasound scans, resin casts, and histologic investigation at the recurrence of the saphenofemoral junction.

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Objective: We observed long-term venous ultrasound and plethysmographic changes after varicose vein surgery, to determine factors that influence recurrence.

Methods And Materials: This observational sequential prospective study was carried out in an institutional referral center with day surgery. Subjects were 92 consecutive patients, ages 20 to 75 years, with symptomatic varicose veins in 127 limbs, who were able to complete regular assessment.

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Background: Abdominal aortic aneurysm (AAA) is an important cause of death in Canada, and about 80% of the deaths are due to ruptured aneurysm.

Method: To determine the most cost-effective way of controlling AAA in terms of early detection and clinical management, a cohort analysis was undertaken beginning at age 50 years, using a multistate life-table model with parameters derived from published articles. The model was used to determine (a) the optimum size for elective surgery and (b) the optimum rate of detection of intact AAA.

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A prospective analysis of risk factors for Alzheimer's disease was a major objective of the Canadian Study of Health and Aging, a nationwide, population-based study. Of 6,434 eligible subjects aged 65 years or older in 1991, 4,615 were alive in 1996 and participated in the follow-up study. All participants were cognitively normal in 1991 when they completed a risk factor questionnaire.

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