The role of seasonal grass pollen on childhood asthma emergency department presentations

Journal article


Erbas, B., Akram, M., Dharmage, S. C., Tham, R., Dennekamp, M., Newbigin, E., Taylor, P., Tang, M. L. K. and Abramson, M. J.. (2012). The role of seasonal grass pollen on childhood asthma emergency department presentations. Clinical and Experimental Allergy. 42(5), pp. 799 - 805. https://doi.org/10.1111/j.1365-2222.2012.03995.x
AuthorsErbas, B., Akram, M., Dharmage, S. C., Tham, R., Dennekamp, M., Newbigin, E., Taylor, P., Tang, M. L. K. and Abramson, M. J.
Abstract

Background: Few studies have focused on the role of grass pollen on asthma emergency department (ED) presentations among children. None have examined whether a dose-response effect exists between grass pollen levels and these asthma exacerbations. Objectives: To examine the association between increasing ambient levels of grass pollen and asthma ED presentations in children. To determine whether these associations are seen only after a thunderstorm, or whether grass pollen levels have a consistent influence on childhood asthma ED visits during the season. Methods: A short time series ecological study was conducted for asthma presentations to ED among children in Melbourne, Victoria, and grass pollen, meteorological and air quality measurements recorded during the selected 2003 period. A semi-parametric Poisson regression model was used to examine dose-response associations between daily grass pollen levels and mean daily ED attendance for asthma. Results: A smoothed plot suggested a dose-response association. As ambient grass pollen increased to about 19 grains/m3, the same day risk of childhood ED presentations also increased linearly (P < 0.001). Grass pollen levels were also associated with an increased risk in asthma ED presentations on the following day (lag 1, P < 0.001). Conclusion: This is the first study to establish a clear relationship between increased risk of childhood asthma ED attendance and levels of ambient grass pollen below 20 grains/m3, independent of any impact of thunderstorm-associated asthma. These findings have important implications for patient care, such as asthma management programs that notify the general public regarding periods of high grass pollen exposure, as well as defining the timing of initiation of pollen immunotherapy.

Keywordsasthma; environmental asthma; grass pollen
Year2012
JournalClinical and Experimental Allergy
Journal citation42 (5), pp. 799 - 805
PublisherWiley-Blackwell Publishing Ltd.
ISSN0954-7894
Digital Object Identifier (DOI)https://doi.org/10.1111/j.1365-2222.2012.03995.x
Scopus EID2-s2.0-84859951352
Page range799 - 805
Research GroupMary MacKillop Institute for Health Research
Publisher's version
File Access Level
Controlled
Place of publicationUnited Kingdom
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Bowatte, G., Tham, R., Allen, K. J., Tan, D. J., Lau, M. X. Z., Dai, X. and Lodge, C. J.. (2015). Breastfeeding and childhood acute otitis media: A systematic review and meta-analysis. Acta Paediatrica. 104(467), pp. 85 - 95. https://doi.org/10.1111/apa.13151
Analysis of interrupted time-series relating to statewide sports injury data
Akram, Muhammad and Finch, Caroline F.. (2015). Analysis of interrupted time-series relating to statewide sports injury data. Australasian Epidemiologist. 22(1), pp. 29 - 31.
Cluster randomised crossover trials with binary data and unbalanced cluster sizes: Application to studies of near-universal interventions in intensive care
Forbes, Andrew B., Akram, Muhammad, Pilcher, David, Cooper, Jamie and Bellomo, Rinaldo. (2015). Cluster randomised crossover trials with binary data and unbalanced cluster sizes: Application to studies of near-universal interventions in intensive care. Clinical Trials. 12(1), pp. 34 - 44. https://doi.org/10.1177/1740774514559610
Reporting dental trauma and its inclusion in an injury surveillance system in Victoria, Australia
Dang, K. M., Day, P. F., Calache, H., Tham, R. and Parashos, P.. (2015). Reporting dental trauma and its inclusion in an injury surveillance system in Victoria, Australia. Australian Dental Journal. 60(1), pp. 88 - 95. https://doi.org/10.1111/adj.12273
Impact of fine particulate matter (PM < inf > 2.5 < /inf > ) exposure during wildfires on cardiovascular health outcomes
Haikerwal, Anjali, Akram, Muhammad, Del Monaco, Anthony, Smith, Karen, Sim, Malcolm R., Meyer, Mick, Tonkin, Andrew M., Abramson, Michael J. and Dennekamp, Martine. (2015). Impact of fine particulate matter (PM < inf > 2.5 < /inf > ) exposure during wildfires on cardiovascular health outcomes. Journal of the American Heart Association. 4(7), pp. 1 - 11. https://doi.org/10.1161/JAHA.114.001653
Investing in longitudinal studies of primary healthcare: what can we learn about service performance, sustainability and quality?
Ward, Bernadette M., Buykx, P. F., Tham, Rachel, Kinsman, Leigh and Humphreys, John S.. (2014). Investing in longitudinal studies of primary healthcare: what can we learn about service performance, sustainability and quality? Rural and Remote Health. 14(4), pp. 1 - 6.
Staff perceptions of primary healthcare service change: Influences on staff satisfaction
Tham, Rachel, Buykx, Penny, Kinsman, Leigh, Ward, Bernadette, Humphreys, John S., Asaid, Adel, Tuohey, Kathy and Jenner, Rohan. (2014). Staff perceptions of primary healthcare service change: Influences on staff satisfaction. Australian Health Review. 38(5), pp. 580 - 583. https://doi.org/10.1071/AH14015
Comparison of estimators of the weibull distribution
Akram, Muhammad and Hayat, Aziz. (2014). Comparison of estimators of the weibull distribution. Journal of Statistical Theory and Practice. 8(2), pp. 238 - 259. https://doi.org/10.1080/15598608.2014.847771
Outdoor fungi and child asthma health service attendances
Tham, Rachel, Dharmage, Shyamali C., Taylor, Philip E., Katelaris, Constance H., Vicendese, Don, Abramson, Michael J. and Erbas, Bircan. (2014). Outdoor fungi and child asthma health service attendances. Pediatric Allergy and Immunology. 25(5), pp. 439 - 449. https://doi.org/10.1111/pai.12257
Pattern and factors associated with utilization of dental services among older adults in rural Victoria
Mariño, Rodrigo Jose, Khan, A. R., Tham, Rachel, Khew, Chee-Wah and Stevenson, Christine. (2014). Pattern and factors associated with utilization of dental services among older adults in rural Victoria. Australian Dental Journal. 59(4), pp. 504 - 510. https://doi.org/10.1111/adj.12216
Oral healthcare issues in rural residential aged care services in Victoria, Australia
Tham, Rachel and Hardy, Susan. (2013). Oral healthcare issues in rural residential aged care services in Victoria, Australia. Gerodontology. 30(2), pp. 126-132. https://doi.org/10.1111/j.1741-2358.2012.00652.x
Study protocol : Evaluating the impact of a rural Australian primary health care service on rural health
Tham, Rachel, Humphreys, John S., Kinsman, Leigh, Buykx, Penny, Asaid, Adel and Tuohey, Kathy. (2011). Study protocol : Evaluating the impact of a rural Australian primary health care service on rural health. BMC Health Services Research. 11(1), pp. 1-6. https://doi.org/10.1186/1472-6963-11-52
Resampling methods for the nonparametric and generalized Behrens-Fisher problems
Steland, Ansgar, Padmanabhan, Appaswamy R. and Akram, Muhammad. (2011). Resampling methods for the nonparametric and generalized Behrens-Fisher problems. Sankhya: The Indian Journal of Statistics. 73-A(2), pp. 267 - 302. https://doi.org/10.1007/s13171-011-0015-z