OBJECTIVE: To investigate how daily variations in ambient air pollution, especially in particles, during the cold of winter affect repeated measurements of baseline lung function and exercise induced bronchial responsiveness among primary school children with chronic respiratory symptoms. METHODS: During alternate school weeks (maximum five) from February to April 1994, 33 children took part in exercise challenge tests (n=141 tests). The exercise challenges were conducted outdoors in a school yard in the centre of Kuopio, Finland. Spirometric lung functions were measured indoors before the exercise, and 3 and 10 minutes after. Daily mean concentrations of PM(10), black smoke (BS), NO(2), CO, SO(2), and particle size and numbers were monitored at a nearby fixed monitoring site. RESULTS: Daily variations in ambient air pollution were not associated with enhanced bronchial responsiveness. However, increased concentrations of BS, PM(10), particle numbers, NO(2), and CO were consistently associated with an impairment of baseline lung functions. The reductions in forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV(1)) were 0.5% and 0.6%, respectively, for each 10 microg/m(3) increase in BS (lag 2). CONCLUSION: Particles derived from combustion affect baseline lung function rather than bronchial responsiveness among children with chronic respiratory symptoms.
OBJECTIVE: To investigate how daily variations in ambient air pollution, especially in particles, during the cold of winter affect repeated measurements of baseline lung function and exercise induced bronchial responsiveness among primary school children with chronic respiratory symptoms. METHODS: During alternate school weeks (maximum five) from February to April 1994, 33 children took part in exercise challenge tests (n=141 tests). The exercise challenges were conducted outdoors in a school yard in the centre of Kuopio, Finland. Spirometric lung functions were measured indoors before the exercise, and 3 and 10 minutes after. Daily mean concentrations of PM(10), black smoke (BS), NO(2), CO, SO(2), and particle size and numbers were monitored at a nearby fixed monitoring site. RESULTS: Daily variations in ambient air pollution were not associated with enhanced bronchial responsiveness. However, increased concentrations of BS, PM(10), particle numbers, NO(2), and CO were consistently associated with an impairment of baseline lung functions. The reductions in forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV(1)) were 0.5% and 0.6%, respectively, for each 10 microg/m(3) increase in BS (lag 2). CONCLUSION: Particles derived from combustion affect baseline lung function rather than bronchial responsiveness among children with chronic respiratory symptoms.
Authors: E L Avol; W S Linn; R C Peng; J D Whynot; D A Shamoo; D E Little; M N Smith; J D Hackney Journal: Toxicol Ind Health Date: 1989-12 Impact factor: 2.273
Authors: Hui Zhou; Xia Iona Li; Jeong Hee Kim; Muhammad T Salam; Hyo Bin Kim; Rob S McConnell; Rima Habre; Tracy Bastain; Shohreh F Farzan; Jill Johnston; Frank D Gilliland Journal: Ann Allergy Asthma Immunol Date: 2017-12-06 Impact factor: 6.347
Authors: Kimberly M Sanchez; Aimee M Layton; Robert Garofano; Perri Yaniv; Matthew S Perzanowski; Steven N Chillrud; Rachel L Miller; Meyer Kattan; Stephanie Lovinsky-Desir Journal: Ann Am Thorac Soc Date: 2022-01
Authors: Erin J Caraher; Sophia Kwon; Syed H Haider; George Crowley; Audrey Lee; Minah Ebrahim; Liqun Zhang; Lung-Chi Chen; Terry Gordon; Mengling Liu; David J Prezant; Ann Marie Schmidt; Anna Nolan Journal: PLoS One Date: 2017-09-19 Impact factor: 3.240