Table 3. Comparisons with previously reported models, incidence rates, and peak ages of CTS⁵,¹⁰,¹¹,¹²,¹³,¹⁴,¹⁵,¹⁶,¹⁷.

Country, authors	Study location, period	Study design	Method of CTS diagnosis	Incidence of CTS (per 100,000 person-years)	Peak age of CTS
United States, Stevens et al.11	Rochester, 1961–1980	Rochester Epidemiology Project	Clinical or electrodiagnostic CTS (diagnostic codes in database)	105	Males: increased with age
					Females: 45–54 years
United States, Nordstrom et al.12	Marshfield, 1991–1993	Wisconsin HMO database	Clinical or electrodiagnostic CTS (diagnostic codes in database and chart review)	346	Males: >65 years
					Females: 50–64 years
Italy, Mondelli et al.10	Siena, 1991–1998	Data from local neurophysiological center	Electrodiagnostic CTS	Crude: 329 (WHO Standardized: 276)	Males: 50–59 and 70–79 years (bimodal distribution)
				Males: 139	Females: 50–59 years
				Females: 506
Italy, Mattioli et al.13	Tuscany, 1997–2000	Discharge records from all hospitals (hospital data)	Clinical CTS	WHO Standardized: 106	Males: 70–79 years
				Males: 44	Females: 50–59 years
				Females: 166
Netherlands, Bongers et al.14	Whole population, 1987–2001	Dutch national survey of general practice	Clinical or electrodiagnostic CTS	1987: 130	1987: 25–44 years
				2001: 180	2001: 45–64 years
United Kingdom, Bland and Rudolfer15	East Kent and Huddersfield, 1991–2001	Data from local neurophysiological center	Electrodiagnostic CTS	104	50–54 and 75–84 years (bimodal distribution)
				Males: 67
				Females: 139
United States, Gelfman et al.16	Olmsted County, 1981–2005	Rochester Epidemiology Project	Clinical or electrodiagnostic CTS (diagnostic codes in database)	376	Males: 70–79 years
					Females: 50–59 years
Sweden, Atroshi et al.5	Skane County, 2003–2008	Skane Health Care Register (covers all public health care providers)	Clinical or electrodiagnostic CTS	Males: 125	Males: 50–59 years
				Females: 324	Females: 50–59 years
Taiwan, Tsai et al.17	Whole population, 2003–2012	Taiwan National Health Insurance Research Database	Clinical or electrodiagnostic CTS	544.12	Males: 50–59 years
					Females: 50–59 years
Korea, current study	Whole population, 2003–2013	Korea National Health Insurance Service–Health Screening database (age >39 years)	Clinical and electrodiagnostic CTS	WHO Standardized: 130.8	Males: 50–59 years
					Females: 40–49 years

CTS: carpal tunnel syndrome, HMO: Health Maintenance Organization, WHO: World Health Organization.