Table 1.

Comparative data of two community-based studies of CRPS.

	De Mos et al.2	Sandroni et al.3
Geography	The Netherlands	Rochester, USA
Time period	1996–2005	1990
Population sample (n)	190,902	106,470
Cases (n)	238	74
Incidence	26/100,000	6/100,000
Peak age of incidence (years)	61–70	51–60
Prevalence	–	21/100,000
CRPS demographics
Average age (years)	52.7	46.9
Female (%)	77.3	81.1
CRPS type II (%)	2.9	12.9
Trigger (%):	44	46
Fracture	23.1	12
Soft tissue	18.1	–
Post-operation	8.8	42
Other	1.3	0
Spontaneous/unknown
Arm:leg ratio	1.5:1	2:1
Multiple sites (%)	–	4.1