Table 2 Prevalence and incidence of SSc in The Netherlands, and prevalence of PH with SSc in The Netherlands

	SSc
	Survey (N)	POEMAS (N)	The Netherlands* (N)
Prevalence of SSc	346	654	1148	8.9 per 100 000 persons
Proportion of total no of patients	30.0%	57.0%	100%	8.9 per 100 000 persons
Incidence of SSc	NA	56	98	0.77 per 100 000 persons
Prevalence of PH	40	56	113	9.9% of patients

*The number of patients in The Netherlands was calculated by the addition of the number of patients in the survey (N), generalised to the whole country (N(survey)/7*10) and the POEMAS cases.
PH, pulmonary hypertension; SSc, systemic sclerosis.