title: A statistical procedure to create a neighborhood socioeconomic index for health inequalities analysis.
abstract: BACKGROUND
  In order to study social health inequalities, contextual (or ecologic) data may constitute an appropriate alternative to individual socioeconomic characteristics. Indices can be used to summarize the multiple dimensions of the neighborhood socioeconomic status. This work proposes a statistical procedure to create a neighborhood socioeconomic index.
  
  
  METHODS
  The study setting is composed of three French urban areas. Socioeconomic data at the census block scale come from the 1999 census. Successive principal components analyses are used to select variables and create the index. Both metropolitan area-specific and global indices are tested and compared. Socioeconomic categories are drawn with hierarchical clustering as a reference to determine "optimal" thresholds able to create categories along a one-dimensional index.
  
  
  RESULTS
  Among the twenty variables finally selected in the index, 15 are common to the three metropolitan areas. The index explains at least 57% of the variance of these variables in each metropolitan area, with a contribution of more than 80% of the 15 common variables.
  
  
  CONCLUSIONS
  The proposed procedure is statistically justified and robust. It can be applied to multiple geographical areas or socioeconomic variables and provides meaningful information to public health bodies. We highlight the importance of the classification method. We propose an R package in order to use this procedure.
authors.affiliation: EHESP Rennes, Sorbonne Paris Cité, Rennes, France. benoit.lalloue@ehesp.fr
authors.forename: Benoît
authors.initials: B
authors.lastname: Lalloué
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Monnez
authors.forename: Cindy
authors.initials: C
authors.lastname: Padilla
authors.forename: Wahida
authors.initials: W
authors.lastname: Kihal
authors.forename: Nolwenn
authors.initials: N
authors.lastname: Le Meur
authors.forename: Denis
authors.initials: D
authors.lastname: Zmirou-Navier
authors.forename: Séverine
authors.initials: S
authors.lastname: Deguen
mesh_terms: D016000:Cluster Analysis; D005602:France; D054624:Health Status Disparities; D006801:Humans; D012111:Residence Characteristics / Q000706:statistics & numerical data*; D017062:Small-Area Analysis; D012959:Socioeconomic Factors; D014505:Urban Population
references.citation: Eur Respir J. 2003 May;21(5):821-6
references.pmid: 12765428
references.citation: Sci Total Environ. 2009 Oct 15;407(21):5501-23
references.pmid: 19695684
references.citation: Environ Health. 2008 Nov 25;7:60
references.pmid: 19032747
references.citation: Soc Sci Med. 2012 Apr;74(8):1204-12
references.pmid: 22365939
references.citation: J Public Health Med. 1991 Nov;13(4):318-26
references.pmid: 1764290
references.citation: Annu Rev Public Health. 1997;18:341-78
references.pmid: 9143723
references.citation: Int J Epidemiol. 2004 Apr;33(2):279-88
references.pmid: 15082627
references.citation: Spat Spatiotemporal Epidemiol. 2011 Dec;2(4):235-46
references.pmid: 22748223
references.citation: Eur Respir J. 2007 May;29(5):897-905
references.pmid: 17215316
references.citation: Br Med J (Clin Res Ed). 1983 May 28;286(6379):1705-9
references.pmid: 6405943
references.citation: Public Health. 2007 Mar;121(3):163-73
references.pmid: 17222876
references.citation: J Epidemiol Community Health. 1995 Dec;49 Suppl 2:S3-8
references.pmid: 8594130
references.citation: Am J Epidemiol. 2007 Jan 1;165(1):22-6
references.pmid: 16973762
references.citation: Pediatrics. 2007 Apr;119(4):e928-39
references.pmid: 17403832
references.citation: Soc Sci Med. 2006 Jan;62(2):348-59
references.pmid: 16039764
references.citation: BMC Public Health. 2009 Jan 22;9:33
references.pmid: 19161613
references.citation: Lancet. 2005 Mar 19-25;365(9464):1099-104
references.pmid: 15781105
references.citation: Soc Sci Med. 2008 Dec;67(12):2007-16
references.pmid: 18950926
references.citation: J Epidemiol Community Health. 1995 Dec;49 Suppl 2:S39-44
references.pmid: 8594133
references.citation: J Epidemiol Community Health. 2012 Nov;66(11):982-9
references.pmid: 22544918
references.citation: Int J Health Geogr. 2007 May 14;6:17
references.pmid: 17502000
references.citation: Soc Sci Med. 2005 Nov;61(10):2096-105
references.pmid: 15922500
references.citation: JAMA. 2005 Dec 14;294(22):2879-88
references.pmid: 16352796
references.citation: Community Med. 1989 Aug;11(3):210-9
references.pmid: 2605887
references.citation: Health Place. 2010 Jul;16(4):703-11
references.pmid: 20399699
references.citation: Chronic Dis Can. 2009;29(4):178-91
references.pmid: 19804682
references.citation: J Epidemiol Community Health. 2006 Feb;60(2):95-101
references.pmid: 16415256
references.citation: BMJ. 1989 Oct 7;299(6704):886-9
references.pmid: 2510878
references.citation: J Epidemiol Community Health. 2003 Mar;57(3):186-99
references.pmid: 12594195
references.citation: Epidemiology. 2011 May;22(3):356-64
references.pmid: 21423017
references.citation: Epidemiology. 2010 Jul;21(4):459-66
references.pmid: 20489648
references.citation: Epidemiology. 2009 Mar;20(2):234-41
references.pmid: 19142164
references.citation: Am J Public Health. 2003 Jul;93(7):1137-43
references.pmid: 12835199
references.citation: Health Place. 2006 Mar;12(1):19-37
references.pmid: 16243678
references.citation: Aust N Z J Public Health. 1998 Dec;22(7):835-7
references.pmid: 9889455
references.citation: J Urban Health. 2006 Nov;83(6):1041-62
references.pmid: 17031568