ArticleSao Paulo medical journal = Revista paulista de medicina2000
Environmental tobacco smoke exposure among non-smoking waiters: measurement of expired carbon monoxide levels.
Article in Sao Paulo medical journal = Revista paulista de medicina, 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
5 citing papers in PubMed, 37 citations in OpenAlex.
- Exhaled carbon monoxide and its associations with smoking, indoor household air pollution and chronic respiratory diseases among 512,000 Chinese adults.International journal of epidemiology · 2013Article
- Quantitative effects of tobacco smoking exposure on the maternal-fetal circulation.BMC pregnancy and childbirth · 2011Article
- Quantification of ETS exposure in hospitality workers who have never smoked.Environmental health : a global access science source · 2010Review
- Effects of acute hypoventilation and hyperventilation on exhaled carbon monoxide measurement in healthy volunteers.BMC pulmonary medicine · 2009Article
- Environmental tobacco smoke exposure among non-smoking waiters: measurement of expired carbon monoxide levels.Sao Paulo medical journal = Revista paulista de medicina · 2000Article
Corrections and comments
- Commented on by
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextExposure to environmental tobacco smoke is a health risk that is of concern to patrons and of particular concern to employees of restaurants and bars.
objectiveTo assess environmental tobacco smoke exposure (using expired carbon monoxide levels) in non-smoking waiters before and after a normal day's shift and to compare pre-exposure levels with non-smoking medical students.
designAn observational study.
settingRestaurants with more than 50 tables or 100 places in São Paulo. SUBJECTS: 100 non-smoking restaurant waiters and 100 non-smoking medical students in São Paulo, Brazil. MAIN MEASUREMENTS: Levels of expired carbon monoxide, measured with a Smokerlyser (Bedfont EC 50 Scientific), before and after a normal day's work.
resultsWaiters' pre-exposure expired carbon monoxide levels were similar to those of medical students, but after a mean of 9 hours exposure in the workplace, median levels more than doubled (2.0 ppm vs. 5.0 ppm, P <0.001). Post-exposure carbon monoxide levels were correlated with the number of tables available for smokers (Kendall's tau = 0.2, P <0.0001).
conclusionsExposure to environmental tobacco smoke is the most likely explanation for the increase in carbon monoxide levels among these non-smoking waiters. These findings can be used to inform the ongoing public health debate on passive smoking.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.