Prognostic models for outcome prediction in patients with chronic obstructive pulmonary disease: systematic review and critical appraisalBMJ 2019; 367 doi: https://doi.org/10.1136/bmj.l5358 (Published 04 October 2019) Cite this as: BMJ 2019;367:l5358
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Bellou and colleagues, in their article on COPD, have raised the issue of insufficient prognostic models from Asia. Another concern is absence of indoor air pollution from such models.  These two facts underscore the need to have more researches on the use of biomass fuel, a common risk factor for developing COPD, in certain parts of Asia including India.
The number of deaths from exposure to air pollution due to cooking was estimated to be 925,000 annually.  Non-smoker females, being the most common victims, are defying the concept that COPD is a smoker’s problem.  An Indian study from an industrial area has highlighted the role of outdoor pollution in developing COPD.  While there are undeniable roles played by factors like vehicular pollution and stubble burning, the Indian Government, through its Ujjwala scheme, is trying to replace biomass with clean fuel for household cooking and has already reached 80 million households.  In the long run, it is expected that more models will come up on this topic.
1. Bellou V, Belbasis L, Konstantinidis AK, et al. Prognostic models for outcome prediction in patients with chronic obstructive pulmonary disease: systematic review and critical appraisal. BMJ 2019;367:l5358
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Competing interests: No competing interests