Table 3.

Initial MPN diagnosis of patients who acquired +1q,12q rearrangements and del(17p)

Chromosomal abnormality, n (%)	PV	ET	PMF
+1q	39/72 (54)*	13/72 (18)	20/72 (28)
12q rearrangement	2/24 (8)	1/24 (4)	21/24 (88)†
del(17)(p13)	8/30 (27)	5/30 (17)	17/30 (57)‡

^*Incidence of patients who acquired gain of 1q with prior history of PV vs ET, P < .001; PV vs PMF, P = .002.

^†Incidence of patients who acquired 12q rearrangement with prior history of PMF vs PV, P < .0001; PMF vs ET, P < .0001.

^‡Incidence of patients who acquired del(17)(p13) with prior history of PMF vs PV, P = .02; PMF vs ET, P = .001.