title: Negative and positive illness representations of rheumatoid arthritis: a latent profile analysis.
abstract: This study extends previous work to consider whether individuals with rheumatoid arthritis (RA) can be categorised into groups with similar illness representations. Data from 227 RA patients attending outpatient clinics were collected prospectively at two time points, 6 months apart. The optimal number of illness representation groups at the baseline assessment was identified using latent profile analysis. Two groups of individuals sharing similar illness perception profiles were identified. The smaller group (43%), characterised by a negative representation of their illness, attributed more symptoms to their condition and reported stronger perceptions of the consequences, chronicity and cyclicality of their condition, and lower control compared to the positive representation group (57%). Cross-sectionally, membership of the negative representation group was associated with higher levels of pain and functional disability and, longitudinally, with increases in levels of pain, functional disability and distress. These data highlight the central role of illness perceptions in RA and suggest that individuals with RA can be categorised into groups with similar illness representations.
authors.affiliation: Health Psychology Section, Psychology Department, Institute of Psychiatry, King's College London, 5th Floor Bermondsey Wing, Guy's Hospital Campus, London Bridge, London, SE1 9RT, UK, sam.norton@kcl.ac.uk.
authors.forename: Sam
authors.initials: S
authors.lastname: Norton
authors.forename: Lyndsay D
authors.initials: LD
authors.lastname: Hughes
authors.forename: Joseph
authors.initials: J
authors.lastname: Chilcot
authors.forename: Amanda
authors.initials: A
authors.lastname: Sacker
authors.forename: Sandra
authors.initials: S
authors.lastname: van Os
authors.forename: Adam
authors.initials: A
authors.lastname: Young
authors.forename: John
authors.initials: J
authors.lastname: Done
mesh_terms: D001172:Arthritis, Rheumatoid / Q000523:psychology*; D002908:Chronic Disease / Q000523:psychology*; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008875:Middle Aged
references.citation: J Psychosom Res. 2009 Nov;67(5):417-23
references.pmid: 19837204
references.citation: J Rheumatol. 1999 Aug;26(8):1686-93
references.pmid: 10451063
references.citation: J Psychosom Res. 1998 May;44(5):573-85
references.pmid: 9623878
references.citation: J Health Psychol. 2011 Apr;16(3):500-9
references.pmid: 21224333
references.citation: Br J Health Psychol. 2005 Nov;10(Pt 4):571-87
references.pmid: 16238866
references.citation: Am J Nephrol. 2011;33(4):358-63
references.pmid: 21430374
references.citation: Arthritis Rheum. 2009 Aug 15;61(8):1054-61
references.pmid: 19644904
references.citation: Arthritis Care Res. 1995 Jun;8(2):80-7
references.pmid: 7794990
references.citation: Psychol Health Med. 2012;17(4):427-39
references.pmid: 22111893
references.citation: J Psychosom Res. 2008 Dec;65(6):603-9
references.pmid: 19027451
references.citation: Arthritis Rheum. 2009 Aug;60(8):2262-71
references.pmid: 19644846
references.citation: Rheumatology (Oxford). 2000 Jun;39(6):603-11
references.pmid: 10888704
references.citation: Br J Rheumatol. 1996 Sep;35(9):879-83
references.pmid: 8810672
references.citation: J Psychosom Res. 2001 Dec;51(6):713-9
references.pmid: 11750293
references.citation: Best Pract Res Clin Rheumatol. 2001 Mar;15(1):67-76
references.pmid: 11358415
references.citation: J Psychosom Res. 2010 Feb;68(2):203-12
references.pmid: 20105704
references.citation: Nat Rev Rheumatol. 2012 Sep;8(9):553-9
references.pmid: 22801981
references.citation: J Rheumatol. 1982 Sep-Oct;9(5):789-93
references.pmid: 7175852
references.citation: J Behav Med. 1997 Oct;20(5):489-504
references.pmid: 9415858
references.citation: Health Psychol. 1998 May;17(3):262-8
references.pmid: 9619476
references.citation: Acta Psychiatr Scand. 1983 Jun;67(6):361-70
references.pmid: 6880820
references.citation: J Health Psychol. 2009 Mar;14(2):306-12
references.pmid: 19237498
references.citation: Pain. 2004 Apr;108(3):276-283
references.pmid: 15030947
references.citation: Ann Rheum Dis. 2002 Apr;61(4):335-40
references.pmid: 11874837
references.citation: J Health Psychol. 2005 May;10(3):457-74
references.pmid: 15857874
references.citation: BMJ. 1996 May 11;312(7040):1191-4
references.pmid: 8634561
references.citation: Rheumatology (Oxford). 2000 Feb;39(2):122-32
references.pmid: 10725061
references.citation: J Psychosom Res. 2011 Sep;71(3):148-53
references.pmid: 21843749
references.citation: Rheumatology (Oxford). 2006 Nov;45(11):1325-7
references.pmid: 16908510
references.citation: Health Policy. 1990 Dec;16(3):199-208
references.pmid: 10109801
references.citation: Arthritis Rheum. 1995 Jan;38(1):44-8
references.pmid: 7818570
references.citation: Br J Dermatol. 2000 May;142(5):899-907
references.pmid: 10809846
references.citation: Rheumatology (Oxford). 2007 Jun;46(6):904-6
references.pmid: 17449488
references.citation: J Psychosom Res. 1999 Feb;46(2):155-64
references.pmid: 10098824
references.citation: Rheumatology (Oxford). 2004 Sep;43(9):1142-9
references.pmid: 15199221
references.citation: Pain. 2004 May;109(1-2):181-8
references.pmid: 15082140
references.citation: J Rheumatol Suppl. 2004 Mar;69:48-54
references.pmid: 15053454
references.citation: Br J Rheumatol. 1986 May;25(2):206-9
references.pmid: 3708236
references.citation: Gen Hosp Psychiatry. 2007 Mar-Apr;29(2):147-55
references.pmid: 17336664
references.citation: Br J Health Psychol. 2007 Sep;12(Pt 3):323-45
references.pmid: 17640450
references.citation: J Psychosom Res. 2013 Apr;74(4):320-6
references.pmid: 23497834