Judith Leech

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This study compares two North American time-activity data bases: the National Human Activity Pattern Survey (NHAPS) of 9386 interviewees in 1992-1994 in the continental USA with the Canadian Human Activity Pattern Survey (CHAPS) of 2381 interviewees in 1996-1997 in four major Canadian cities. Identical surveys and methodology were used to collect this data:(More)
To determine if the severity of osteoporosis and its resultant hyperkyphosis cause measurable impairment of lung function, 74 women referred for osteoporosis evaluation underwent pulmonary function testing. Women with thoracic wedge compression fractures secondary to osteoporosis had significantly lower percent predicted FVC than did those without(More)
BACKGROUND Relatively few studies have been conducted of the association between air pollution and emergency department (ED) visits, and most of these have been based on a small number of visits, for a limited number of health conditions and pollutants, and only daily measures of exposure and response. METHODS A time-series analysis was conducted on(More)
To clarify the health effects of ozone exposure in young children, the authors studied the association between air pollution and hospital admissions for acute respiratory problems in children less than 2 years of age during the 15-year period from 1980 to 1994 in Toronto, Canada. The daily time series of admissions was adjusted for the influences of day of(More)
The ability of preoperative quality-of-life and physiologic variables to predict postoperative complications was tested in 117 consecutive patients undergoing thoracotomy for possible or definite lung cancer. Preoperatively, quality of life was globally assessed by the QLI and Sickness Impact Profile. Dyspnea was assessed by the Clinical Dyspnea Index and a(More)
The assessment of health risk due to environmental contaminants depends upon accurate estimates of the distribution of population exposures. Exposure assessment, in turn, requires information on the time people spend in micro-environments and their activities during periods of exposure. This paper describes preliminary results including study methodology(More)
To assess the effects of long-term nasal continuous positive airway pressure (CPAP) in occlusive sleep apnea syndrome (OSA), 17 patients with severe symptomatic OSA had repeated spirometry, arterial blood gases, and nocturnal polysomnograms off nasal CPAP after 3 to 46 months of treatment with nasal CPAP. Without loss of weight or change in respiratory(More)
Although pneumococcal vaccine has been recommended for patients with chronic obstructive pulmonary disease (COPD), its efficacy in this population has not been shown. A double-blind randomized controlled trial of 14-valent pneumococcal vaccine was carried out in 189 men and women aged 40 to 89 years with a clinical diagnosis of COPD and a forced expiratory(More)
With the question in mind is superior vena caval obstruction a medical emergency, we reviewed 107 cases of superior vena caval obstruction in adult patients. We sought details of the time duration between the onset of symptoms and the treatment, and examined the complication and survival of patients with this disorder. Fifteen percent of the cases developed(More)
The relationships of lung functions to maximal respiratory pressure relative to the role of other recognized determinants (height, weight, age, and smoking status) were examined in 924 healthy Caucasian urban residents, 369 males 15 to 35 yr of age and 555 females 13 to 35 yr of age. In subjects no longer thought to be growing in stature, height was the(More)