Figure 2.

CRPS referrals and between-group differences. (A) Of the 30 CRPS referrals, 25 were classified as CPP (18/19 met the Budapest Criteria and 7/11 did not) and 5 as CSP (1/19 met the Budapest criteria, 4/11 did not). Lowest reported pain scores were significantly different between CPP and CSP main parent code groups (NRS pain (low) of 5 vs 4; P=0.006). (B) Of the CRPS referrals classified as CPP, 24 received an adjunct code, most frequently chronic neuropathic pain (n=20). The difference in lowest reported pain remained between subgroups (Kruskal-Wallis 11.34, P=0.01), specifically between the “CSP–no adjunct” subgroup and the two CPP subgroups “CPP–no adjunct” (P=0.048) and “CPP-adjunct” (P=0.015), on post hoc testing with Dunn’s multiple comparison test. There is a small gradient in lowest pain scores from “CPP–no adjunct” (NRS 5) to “CSP–no adjunct” (NRS 3).