Table 2. Sickle cell disease patients and control groups’ characteristics (quantitative variables).

The p-value was computed by using independent-samples t-test; a p-value of less than 0.05 was considered statistically significant.

VOC: vaso-occlusive crises 

Variable		Mean +/- SD	95% CI lower	95% CI upper	P-value
Age	SCD	29.82 +/- 5.28	29.11	30.52	0.654
	Control	29.58 +/- 5.67	28.78	30.37
Gravidity	SCD	2.60 + /- 1.53	2.40	2.81	0.233
	Control	2.79 +/- 1.66	2.56	3.02
Parity	SCD	1.23 +/- 1.17	1.07	1.39	0.261
	Control	1.38 +/- 1.43	1.18	1.57
Gestational age	SCD	36.97 +/- 1.92	36.71	37.23	<0.001
	Control	38.07 +/- 2.50	37.72	38.42
Number of admissions	SCD	2.93 +/- 2.50	2.59	3.26	<0.001
	Control	1.20 +/- 0.48	1.13	1.26
Number of VOC	SCD	1.47 +/- 2.47	1.14	1.80	------
	Control	-----------	------	------
Birth weight	SCD	2.81 +/- 0.52	2.74	2.88	<0.001
	Control	3.07 +/- 0.65	2.98	3.16