Table 2. Clinical characteristics.

Characteristic	SCD Patients (n=40)	Non-SCD Patients (n=19)	P-Value
Mean Age of RIP Onset, yrs (SD)	19.5 (8.2)	29.1 (13.8)	0.0024
Mean Time-Length with RIP, yrs (SD)	9.2 (6.9)	4.6 (5.0)	0.0042
Episode Onset, n (%)
Sleep	37 (92.5)	15 (78.9)	0.1030
≤2 Episode Duration, n (%)	30 (75)	10 (52.6)	0.1351
≥ Weekly Episode Frequency, n (%)	28 (70)	14 (73.7)	1.0000
Major Episodes, n (%)	14 (35)	11 (57.9)	0.0963
Erectile Dysfunction (includes mild ED), n (%)	19 (47.5)	4 (21.1)	0.0516
Erectile Dysfunction (excludes mild ED), n (%)	13 (32.5)	3 (15.8)	0.1773
Perceived Penile Deformity or Scarring, n (%)	n = 36 7 (19.4)	n = 8 1 (12.5)	1.0000

SCD = sickle cell disease, n = number, yrs = years, SD = standard deviation, RIP = recurrent ischemic priapism