Journal of Breath Research

Journal of Breath Research is dedicated to all aspects of scientific breath research. The traditional focus is on analysis of volatile compounds and aerosols in exhaled breath for the investigation of exogenous exposures, metabolism, toxicology, health status and the diagnosis of disease and breath odours. The journal also welcomes other breath-related topics. Typical areas of interest include: Big laboratory instrumentation: describing new state-of-the-art analytical instrumentation capable of performing high-resolution discovery and targeted breath research; exploiting complex technologies drawn from other areas of biochemistry and genetics for breath research. Engineering solutions: developing new breath sampling technologies for condensate and aerosols, for chemical and optical sensors, for extraction and sample preparation methods, for automation and standardization, and for multiplex analyses to preserve the breath matrix and facilitating analytical throughput. Measure exhaled constituents (e.g. CO2, acetone, isoprene) as markers of human presence or mitigate such contaminants in enclosed environments. Human and animal in vivo studies: decoding the 'breath exposome', implementing exposure and intervention studies, performing cross-sectional and case-control research, assaying immune and inflammatory response, and testing mammalian host response to infections and exogenous exposures to develop information directly applicable to systems biology. Studying inhalation toxicology; inhaled breath as a source of internal dose; resultant blood, breath and urinary biomarkers linked to inhalation pathway. Cellular and molecular level in vitro studies. Clinical, pharmacological and forensic applications. Mathematical, statistical and graphical data interpretation.

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Category	Year	Quartile
Pulmonary and Respiratory Medicine	2008	Q2
Pulmonary and Respiratory Medicine	2009	Q2
Pulmonary and Respiratory Medicine	2010	Q2
Pulmonary and Respiratory Medicine	2011	Q2
Pulmonary and Respiratory Medicine	2012	Q2
Pulmonary and Respiratory Medicine	2013	Q2
Pulmonary and Respiratory Medicine	2014	Q2
Pulmonary and Respiratory Medicine	2015	Q1
Pulmonary and Respiratory Medicine	2016	Q1
Pulmonary and Respiratory Medicine	2017	Q1
Pulmonary and Respiratory Medicine	2018	Q2
Pulmonary and Respiratory Medicine	2019	Q2
Pulmonary and Respiratory Medicine	2020	Q2
Pulmonary and Respiratory Medicine	2021	Q2
Pulmonary and Respiratory Medicine	2022	Q2
Pulmonary and Respiratory Medicine	2023	Q2

SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Year	SJR
2008	0.418
2009	0.497
2010	0.621
2011	0.597
2012	0.679
2013	0.637
2014	1.028
2015	1.238
2016	1.125
2017	1.486
2018	0.758
2019	0.909
2020	0.967
2021	0.786
2022	0.810
2023	0.784

Total Documents

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

Year	Documents
2007	8
2008	64
2009	30
2010	36
2011	43
2012	50
2013	68
2014	54
2015	59
2016	86
2017	71
2018	90
2019	58
2020	80
2021	61
2022	52
2023	54

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per document	Year	Value
Cites / Doc. (4 years)	2007	0.000
Cites / Doc. (4 years)	2008	3.625
Cites / Doc. (4 years)	2009	1.625
Cites / Doc. (4 years)	2010	2.275
Cites / Doc. (4 years)	2011	2.826
Cites / Doc. (4 years)	2012	2.572
Cites / Doc. (4 years)	2013	3.994
Cites / Doc. (4 years)	2014	3.980
Cites / Doc. (4 years)	2015	3.874
Cites / Doc. (4 years)	2016	3.788
Cites / Doc. (4 years)	2017	3.813
Cites / Doc. (4 years)	2018	3.630
Cites / Doc. (4 years)	2019	3.196
Cites / Doc. (4 years)	2020	3.728
Cites / Doc. (4 years)	2021	3.773
Cites / Doc. (4 years)	2022	3.723
Cites / Doc. (4 years)	2023	3.745
Cites / Doc. (3 years)	2007	0.000
Cites / Doc. (3 years)	2008	3.625
Cites / Doc. (3 years)	2009	1.625
Cites / Doc. (3 years)	2010	2.275
Cites / Doc. (3 years)	2011	2.669
Cites / Doc. (3 years)	2012	2.954
Cites / Doc. (3 years)	2013	3.597
Cites / Doc. (3 years)	2014	4.137
Cites / Doc. (3 years)	2015	4.081
Cites / Doc. (3 years)	2016	4.122
Cites / Doc. (3 years)	2017	4.085
Cites / Doc. (3 years)	2018	2.972
Cites / Doc. (3 years)	2019	3.219
Cites / Doc. (3 years)	2020	3.680
Cites / Doc. (3 years)	2021	3.741
Cites / Doc. (3 years)	2022	3.990
Cites / Doc. (3 years)	2023	3.891
Cites / Doc. (2 years)	2007	0.000
Cites / Doc. (2 years)	2008	3.625
Cites / Doc. (2 years)	2009	1.625
Cites / Doc. (2 years)	2010	1.989
Cites / Doc. (2 years)	2011	2.833
Cites / Doc. (2 years)	2012	2.570
Cites / Doc. (2 years)	2013	3.591
Cites / Doc. (2 years)	2014	4.280
Cites / Doc. (2 years)	2015	4.385
Cites / Doc. (2 years)	2016	4.460
Cites / Doc. (2 years)	2017	3.517
Cites / Doc. (2 years)	2018	2.943
Cites / Doc. (2 years)	2019	2.969
Cites / Doc. (2 years)	2020	3.615
Cites / Doc. (2 years)	2021	3.848
Cites / Doc. (2 years)	2022	3.780
Cites / Doc. (2 years)	2023	4.133

Total Cites

Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Cites	Year	Value
Self Cites	2007	0
Self Cites	2008	10
Self Cites	2009	34
Self Cites	2010	36
Self Cites	2011	102
Self Cites	2012	69
Self Cites	2013	114
Self Cites	2014	227
Self Cites	2015	141
Self Cites	2016	236
Self Cites	2017	183
Self Cites	2018	147
Self Cites	2019	115
Self Cites	2020	133
Self Cites	2021	113
Self Cites	2022	128
Self Cites	2023	109
Total Cites	2007	0
Total Cites	2008	29
Total Cites	2009	117
Total Cites	2010	232
Total Cites	2011	347
Total Cites	2012	322
Total Cites	2013	464
Total Cites	2014	666
Total Cites	2015	702
Total Cites	2016	746
Total Cites	2017	813
Total Cites	2018	642
Total Cites	2019	795
Total Cites	2020	806
Total Cites	2021	853
Total Cites	2022	794
Total Cites	2023	751

External Cites per Doc

Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

Cites	Year	Value
External Cites per document	2007	0
External Cites per document	2008	2.375
External Cites per document	2009	1.153
External Cites per document	2010	1.922
External Cites per document	2011	1.885
External Cites per document	2012	2.321
External Cites per document	2013	2.713
External Cites per document	2014	2.727
External Cites per document	2015	3.262
External Cites per document	2016	2.818
External Cites per document	2017	3.166
External Cites per document	2018	2.292
External Cites per document	2019	2.753
External Cites per document	2020	3.073
External Cites per document	2021	3.246
External Cites per document	2022	3.347
External Cites per document	2023	3.326
Cites per document	2007	0.000
Cites per document	2008	3.625
Cites per document	2009	1.625
Cites per document	2010	2.275
Cites per document	2011	2.669
Cites per document	2012	2.954
Cites per document	2013	3.597
Cites per document	2014	4.137
Cites per document	2015	4.081
Cites per document	2016	4.122
Cites per document	2017	4.085
Cites per document	2018	2.972
Cites per document	2019	3.219
Cites per document	2020	3.680
Cites per document	2021	3.741
Cites per document	2022	3.990
Cites per document	2023	3.891

% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Year	International Collaboration
2007	25.00
2008	20.31
2009	20.00
2010	16.67
2011	25.58
2012	26.00
2013	32.35
2014	35.19
2015	30.51
2016	37.21
2017	33.80
2018	27.78
2019	20.69
2020	28.75
2021	22.95
2022	21.15
2023	14.81

Citable documents

Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Documents	Year	Value
Non-citable documents	2007	0
Non-citable documents	2008	2
Non-citable documents	2009	5
Non-citable documents	2010	7
Non-citable documents	2011	7
Non-citable documents	2012	7
Non-citable documents	2013	9
Non-citable documents	2014	9
Non-citable documents	2015	7
Non-citable documents	2016	5
Non-citable documents	2017	3
Non-citable documents	2018	5
Non-citable documents	2019	4
Non-citable documents	2020	5
Non-citable documents	2021	6
Non-citable documents	2022	5
Non-citable documents	2023	7
Citable documents	2007	0
Citable documents	2008	6
Citable documents	2009	67
Citable documents	2010	95
Citable documents	2011	123
Citable documents	2012	102
Citable documents	2013	120
Citable documents	2014	152
Citable documents	2015	165
Citable documents	2016	176
Citable documents	2017	196
Citable documents	2018	211
Citable documents	2019	243
Citable documents	2020	214
Citable documents	2021	222
Citable documents	2022	194
Citable documents	2023	186

Cited documents

Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Documents	Year	Value
Uncited documents	2007	0
Uncited documents	2008	2
Uncited documents	2009	28
Uncited documents	2010	31
Uncited documents	2011	39
Uncited documents	2012	21
Uncited documents	2013	23
Uncited documents	2014	21
Uncited documents	2015	29
Uncited documents	2016	25
Uncited documents	2017	26
Uncited documents	2018	37
Uncited documents	2019	37
Uncited documents	2020	26
Uncited documents	2021	36
Uncited documents	2022	41
Uncited documents	2023	37
Cited documents	2007	0
Cited documents	2008	6
Cited documents	2009	44
Cited documents	2010	71
Cited documents	2011	91
Cited documents	2012	88
Cited documents	2013	106
Cited documents	2014	140
Cited documents	2015	143
Cited documents	2016	156
Cited documents	2017	173
Cited documents	2018	179
Cited documents	2019	210
Cited documents	2020	193
Cited documents	2021	192
Cited documents	2022	158
Cited documents	2023	156

% Female Authors

Evolution of the percentage of female authors.

Year	Female Percent
2007	12.50
2008	20.10
2009	23.89
2010	35.96
2011	28.24
2012	25.79
2013	32.22
2014	30.60
2015	39.39
2016	34.12
2017	36.78
2018	33.09
2019	33.33
2020	39.01
2021	36.50
2022	38.92
2023	43.04

Documents cited by public policy (Overton)

Evolution of the number of documents cited by public policy documents according to Overton database.

Documents	Year	Value
Overton	2007	1
Overton	2008	4
Overton	2009	3
Overton	2010	3
Overton	2011	4
Overton	2012	9
Overton	2013	3
Overton	2014	6
Overton	2015	6
Overton	2016	8
Overton	2017	7
Overton	2018	5
Overton	2019	3
Overton	2020	2
Overton	2021	3
Overton	2022	0
Overton	2023	0