. 2008 Jan 10;111(12):5721–5726. doi: 10.1182/blood-2007-02-074849

Table 3.

Comparison of individuals with pHTN to those without pHTN

	Patients with pHTN, n = 44	Patients without pHTN
	Patients with pHTN, n = 44	All, n = 67	Normal echo, n = 29	Left heart abnormalities, n = 38
Mean age, y (SD)^*	41.09 (12.09)	32.69 (11.86)	31.24 (9.23)	33.79 (13.54)
Female-male ratio	1.2	1.03	1.07	1.0
Mean hgb, g/L (SD)^*	77.2 (13.5)	85.3 (14.9)	85.6 (15.3)	85.1 (14.8)
Currently on HU treatment, %	53.5	54.8	62.9	48.6

Mean age was significantly different in patients with pHTN compared with those patients (all) without pHTN (P < .001). Mean Hgb in grams per liter was significantly different in patients with pHTN compared with those patients (all) without pHTN (P = .005).