Joshua Lawson

Learn More
PURPOSE To examine relationships between selected sociodemographic, health-related and environmental factors and levels of physical activity in older adults across three age groups. METHODS Seven hundred sixty-four older adults (mean age = 77.4 +/- 8.6 yr) from a midsize Canadian city completed a self-administered questionnaire under researcher(More)
UNLABELLED The relationship between household endotoxin and asthma in children is not clear. To further investigate the relationship between sources of endotoxin and childhood asthma, we conducted a case-control study of children with and without asthma and examined their more frequent household exposures in the home. Children ages 6-13 years with current(More)
BACKGROUND Increased daytime sleepiness is an important symptom of obstructive sleep apnea (OSA). OSA is frequently underdiagnosed, and the Epworth Sleepiness Scale (ESS) can be a useful tool in alerting physicians to a potential problem involving OSA. OBJECTIVE To measure the prevalence and determinants of daytime sleepiness measured using the ESS in a(More)
The medial iliac and superficial inguinal lymph nodes are not routinely palpable in the dog, and ultrasound imaging provides an alternate noninvasive technique to assess these lymph nodes, as well as to guide needle aspiration. Herein we describe the ultrasound characteristics of the medial iliac and superficial inguinal lymph nodes in 50 healthy dogs, as(More)
Respiratory symptoms, reductions in pulmonary function and increased bronchial responsiveness have been described in exposed workers and in naïve volunteers exposed to intensive swine production facilities. Typically, this occurs in persons who have been employed for a long duration or in previously unexposed, naïve volunteers. The current authors describe(More)
BACKGROUND Asthma prevalence has been reported to be lower in rural regions, but the reasons for this are not known. OBJECTIVE To confirm the existence of an urban-rural geographic gradient in asthma prevalence among Canadian youths and to evaluate whether this gradient was mediated by health behaviors. METHODS Cross-sectional data from 4,726 Canadian(More)
BACKGROUND Asthma accounts for considerable burden on health care, but in most cases, asthma can be controlled. Quality-of-care indicators would aid in monitoring asthma management. We describe the quality of asthma care using a set of proposed quality indicators. METHODS We performed a retrospective cross-sectional study using health databases in(More)
OBJECTIVE To investigate the effect of exposure to damp housing on respiratory symptoms in women and men. METHOD We examined sex differences in the relationship between damp housing and respiratory symptoms in a cross-sectional survey of 1988 adults, 18 to 74 years of age, using a self-administered questionnaire. We used chi (2) and t-tests to test(More)
BACKGROUND Previous studies have documented similar levels of end-of-life symptom burden for lung cancer and chronic obstructive pulmonary disease (COPD) patients, yet there has been little comparison of health care utilization during this period. This study contrasts health care utilization by people with COPD and those with lung cancer in the 12 months(More)
OBJECTIVES To determine the prevalence of asthma, bronchitis, and COPD using the physician services database of the Saskatchewan Health Department from 1991 to 1998. DESIGN Descriptive population-based study. SETTING The Province of Saskatchewan, Canada. PARTICIPANTS Residents of Saskatchewan covered by universal health care in the province. RESULTS(More)