Summary of studies including the incidence of primary Sjogren’s syndrome
| Author | Year | Country | Study period | Cases finding | Study design | Case ascertainment | Age of patients with pSS* | pSS cases (n) | Person- years | Female/male (n) | IR (95% CI)/100 000 | Quality |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pillemer et al31 | 2001 | USA (Minnesota) | 1976–1992 | Medical record search | Population based | NS | 59.0±15.8 | 53 | 1 358 994 | 51/2 | 6.90 (5.01 to 8.79) | Good |
| Plesivcnik Novljan et al32 | 2004 | Slovenia (Ljubljana) | 2000–2002 | Medical record search | Population based | EC-1996† | 51.3±14.5 | 71 | 1 799 685 | 65/6‡ | 7.22 (5.47 to 8.98) | Good |
| Alamanos et al14§ | 2006 | Greece (north-west Greece) | 1982–2003 | Medical record search, personal registry physicians | Population based | AECG-2002¶ | 55.4±12.5 | 422 | 7 962 264 | 402/20 | 10.10 (9.11 to 11.08) | Good |
| Weng et al33 | 2011 | China (Taiwan) | 2005–2007 | NHI Research Database | Population based | NS | 53.5±14.2 | 3352 | 55 866 666 | 3040/312 | 11.00 (10.61 to 11.39) | Good |
| Yu et al13§ | 2013 | China (Taiwan) | 2000–2008 | NHI Research Database | Population based | ICD codes System | NS | 855 | 8 066 037 | 736/119 | 18.50 (17.16 to 19.84) | Good |
| See et al19§ | 2013 | China (Taiwan) | 2005–2009 | NHI Research Database | Population based | ICD codes system | NS | 583 | 4 953 660 | 501/83 | 20.05 (18.29 to 21.80) | Good |
*Ages shown as mean±SD.
†EC-1996 is European classification criteria for Sjogren's syndrome published in 1996.
‡Fifty per cent of the study population was assumed to be female.
§The study reported the prevalence and incidence rate of pSS.
¶AECG-2002 is a revised version of the European criteria for Sjogren’s syndrome proposed by the American-European Consensus Group in 2002.
NS, no stated; pSS, primary Sjögren's syndrome.