title: Weight misperception amongst youth of a developing country: Pakistan -a cross-sectional study.
abstract: BACKGROUND
  Weight misperception is the discordance between an individual's actual weight status and the perception of his/her weight. It is a common problem in the youth population as enumerated by many international studies. However data from Pakistan in this area is deficient.
  
  
  METHODS
  A multi-center cross-sectional survey was carried out in undergraduate university students of Karachi between the ages of 15-24. Participants were questioned regarding their perception of being thin, normal or fat and it was compared with their Body Mass Index (BMI). Measurements of height and weight were taken for this purpose and BMI was categorized using Asian cut offs. Weight misperception was identified when the self-perceived weight (average, fat, thin) did not match the calculated BMI distribution. Chi square tests and logistic regression tests were applied to show associations of misperception and types of misperception (overestimation, underestimation) with independent variables like age, gender, type of university and faculties. P-value of <0.05 was taken as statistically significant.
  
  
  RESULTS
  42.4% of the total participants i.e. 43.3% males and 41% females misperceived their weight. Amongst those who misperceived 38.2% had overestimated and 61.8% had underestimated their weight. Greatest misperception of was observed in the overweight category (91%), specifically amongst overweight males (95%). Females of the underweight category overestimated their weight and males of the overweight category underestimated their weight. Amongst the total participants, females overestimated 8 times more than males (OR 8.054, 95% CI 5.34-12.13). Misperception increased with the age of the participants (OR 1.114, 95% CI 1.041-1.191). Odds of misperception were greater in students of private sector universities as compared to public (OR 1.861, 95% CI: 1.29-2.67). Odds of misperception were less in students of medical sciences (OR 0.693, 95% CI 0.491-0.977), engineering (OR 0.586, 95% CI 0.364-0.941) and business administration (OR 0.439, 95% CI 0.290-0.662) as compared to general faculty universities.
  
  
  CONCLUSIONS
  There was marked discrepancy between the calculated BMI and the self-perceived weight in the youth of Karachi. Better awareness campaigns need to be implemented to reverse these trends.
authors.affiliation: Medical Student, Dow Medical College, Dow University of Health Sciences, Baba-E-Urdu Road, Karachi, Pakistan. saleemmdanish@hotmail.com
authors.forename: Muhammad Danish
authors.initials: MD
authors.lastname: Saleem
authors.forename: Gulrayz
authors.initials: G
authors.lastname: Ahmed
authors.forename: Juwaria
authors.initials: J
authors.lastname: Mulla
authors.forename: Syed Sami
authors.initials: SS
authors.lastname: Haider
authors.forename: Mustafa
authors.initials: M
authors.lastname: Abbas
mesh_terms: D000293:Adolescent; D001828:Body Image / Q000523:psychology*; D015992:Body Mass Index; D001835:Body Weight; D016009:Chi-Square Distribution; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D010154:Pakistan; D012307:Risk Factors; D012649:Self Concept; D013334:Students / Q000523:psychology*; D011795:Surveys and Questionnaires; D055815:Young Adult
references.citation: Lancet. 2004 Jan 10;363(9403):157-63
references.pmid: 14726171
references.citation: Diabetes Metab Syndr Obes. 2011;4:245-51
references.pmid: 21792323
references.citation: Zhonghua Liu Xing Bing Xue Za Zhi. 2011 Oct;32(10):964-8
references.pmid: 22333075
references.citation: CMAJ. 2006 Oct 24;175(9):1071-7
references.pmid: 17060656
references.citation: Obes Res Clin Pract. 2008 Jul;2(2):71-142
references.pmid: 24351731
references.citation: Int J Behav Nutr Phys Act. 2011 Feb 07;8:9
references.pmid: 21299879
references.citation: BMC Public Health. 2011 May 23;11:363
references.pmid: 21605350
references.citation: Ann Intern Med. 2006 Apr 4;144(7):485-95
references.pmid: 16585662
references.citation: Int J Behav Nutr Phys Act. 2011 Mar 22;8:20
references.pmid: 21426567
references.citation: Diabetes Care. 2008 Feb;31(2):227-9
references.pmid: 18000179
references.citation: World Health Organ Tech Rep Ser. 2000;894:i-xii, 1-253
references.pmid: 11234459
references.citation: Int J Pediatr Obes. 2011 Jun;6(2-2):e381-9
references.pmid: 20854167
references.citation: Int J Obes (Lond). 2006 Apr;30(4):644-51
references.pmid: 16151414
references.citation: Singapore Med J. 2009 Mar;50(3):303-11
references.pmid: 19352576
references.citation: Body Image. 2009 Mar;6(2):90-6
references.pmid: 19188102
references.citation: J Sch Health. 2011 Feb;81(2):57-64
references.pmid: 21223272
references.citation: Body Image. 2012 Jan;9(1):184-8
references.pmid: 22104126
references.citation: Nutr J. 2006 Mar 31;5:11
references.pmid: 16579846
references.citation: Lancet. 2010 May 15;375(9727):1737-48
references.pmid: 20451244
references.citation: J Sch Health. 2009 Dec;79(12):585-92
references.pmid: 19909422
references.citation: BMC Public Health. 2011 May 24;11:379
references.pmid: 21609460
references.citation: ScientificWorldJournal. 2006 Mar 26;6:365-73
references.pmid: 16565773
references.citation: Pediatrics. 2010 Mar;125(3):e452-8
references.pmid: 20142281
references.citation: Int J Eat Disord. 2010 Nov 1;43(7):628-32
references.pmid: 19718673
references.citation: J Pak Med Assoc. 2002 Jun;52(6):272-6
references.pmid: 12481642
references.citation: Coll Antropol. 2010 Dec;34(4):1295-302
references.pmid: 21874712