Hidradenitis Suppurativa in Kuala Lumpur, Malaysia: A 7-Year Retrospective Review

Table 7

Comparison between our study cohort and previous studies.

Variables	Vazquez et al., 2013	Cosmatos et al., 2013	Vinding et al., 2014	Leelavathi et al., 2009	Our study
Country	Minnesota, USA	USA	Copenhagen, Denmark	HKL	HKL
Year	1968–2008	2007	2014	2002–2006	2009–2016
Study type	Retrospective, medical records	Registry, insurers database	Self-administered questionnaires	Retrospective, medical records	Retrospective, medical records
Number of cases	268 cases; 6.0/100,000 (incidence)	0.053%; (7927/144,000) (prevalence)	2.10%,; (Total patients 16404); (prevalence)	15 cases	62 cases; 0.013/100,000 hospital population (incidence)
Age at diagnosis	Median 30.6 years (9.9–78.5)	Mean 38.2 (14.73) years		Mean 27.8 years; (21–30)	Median 25.0 (12–69) years
Gender F : M	2.2 : 1	3 : 1	1.6 : 1	2.8 : 1	1 : 1
Duration between onset of symptom & diagnosis	3.3 years; (0 to 30 years)	-	-	-	24 months; (1 to 360 months)
Obesity	54.9%		72.9%	13.3%; (33% missing data)	9 patients (14.5%); (up to 90% missing data)