Table 2.

Comparison of the incidence and prevalence of psoriatic arthritis among several countries

Country	Incidence (1/100000)	Ref.	Prevalence	Ref.
Asia
China	NA		0.02%	[33]
Japan	0.1	[17]	0.001%	[32]
Europe	NA		NA
Greece	3	[20]	0.17%	[29]
France	NA		0.19%	[23]
Italy	NA		0.42%	[25]
Germany	NA		0.29%	[24]
Finland	23.1	[18]	NA
Sweden	8	[19]	0.02%-0.25%	[30]
Iceland	NA		0.14%	[28]
Norway	NA		0.2%	[27]
Russia	NA		0.3%	[31]
Americas
United States	7.2	[22]	0.16%	[22]
Argentina	6.3	[92]	0.07%	[21]
Mexico	NA		0.02%	[26]

NA: Not available.