title: Prevalence of monoclonal gammopathy of undetermined significance in Thailand.
abstract: Individuals with monoclonal gammopathy of undetermined significance (MGUS) develop multiple myeloma and related malignancies at the rate of 1% per year. Given differences in ethnicity, data on prevalence and risk factors of MGUS in Thai population will be helpful in understanding the pathogenesis of plasma cell disorders and designing an early cancer detection strategy. Subjects of 50 years or older were included. Demographic data and suspected risk factors were collected. Monoclonal proteins were detected using serum protein electrophoresis. Serum was obtained from 3,260 participants; 1,104 males (33.9%) and 2,156 females (66.1%). The median age was 57 years (range 50-93 years). Monoclonal proteins were detectable in 2.3% (95% confidence interval [CI] 1.8-2.8). M spikes were found in gamma- and beta-globulin regions in 50 (1.5%) and 25 (0.8%) subjects, respectively. The prevalence of MGUS in subjects 50-59, 60-69, and 70 years or older was 2.0% (41/1,975), 2.6% (22/851), and 2.8% (12/434), respectively. By multivariate analysis, MGUS was associated with living outside Bangkok (odds ratio 2.25, 95% CI 1.11-4.58). The overall prevalence of MGUS in the Thai population was 2.3%, which was lower than that in Western countries, but comparable to that in Japan.
authors.affiliation: Transfusion Medicine Unit, King Chulalongkorn Memorial Hospital, Bangkok, Thailand.
authors.forename: Phandee
authors.initials: P
authors.lastname: Watanaboonyongcharoen
authors.forename: Thanyaphong Na
authors.initials: TN
authors.lastname: Nakorn
authors.forename: Ponlapat
authors.initials: P
authors.lastname: Rojnuckarin
authors.forename: Panisinee
authors.initials: P
authors.lastname: Lawasut
authors.forename: Tanin
authors.initials: T
authors.lastname: Intragumtornchai
mesh_terms: D000368:Aged; D044466:Asian People / Q000706:statistics & numerical data*; D001609:Beta-Globulins / Q000378:metabolism; D005260:Female; D006023:Glycoproteins / Q000097:blood; D006801:Humans; D007070:Immunoglobulin A / Q000097:blood; D007074:Immunoglobulin G / Q000097:blood; D007145:Immunoglobulin kappa-Chains / Q000097:blood; D007146:Immunoglobulin lambda-Chains / Q000097:blood; D008297:Male; D008875:Middle Aged; D008998:Monoclonal Gammopathy of Undetermined Significance / Q000097:blood* / Q000208:ethnology*; D009101:Multiple Myeloma / Q000208:ethnology; D015995:Prevalence; D012307:Risk Factors; D013785:Thailand / Q000453:epidemiology; D005719:gamma-Globulins / Q000378:metabolism
chemical_list: D001609:Beta-Globulins; D006023:Glycoproteins; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007145:Immunoglobulin kappa-Chains; D007146:Immunoglobulin lambda-Chains; D005719:gamma-Globulins; C023587:protein M (glycoprotein)