Table 1.

Basic characteristics of study groups

Variables (medians and interquartile ranges)	Homozygous SS [n= 65; 38 (58%) male]	Asymptomatic controls [n= 20; 8 (40%) male]	Group difference (P value)
Age (years)	7.7 (2.7–12.5)	8.7 (5.5–10.8)	0.634
Body mass index z-score	−0.93 (−1.68–0.875)	−0.31 (−1.48–0.08)	0.154
Haemoglobin oxygen saturation (%)	97 (94.0–99.8)	100 (98.0–100)	0.001
Mean arterial blood pressure (mmHg)	71 (64.0–77.3)	79.5 (72.1–83)	0.005
Resting blood flux (PU)	303 (255–338)	234 (188–294)	0.005
Skin temperature (°C)	35.5 (35.0–36.4)	35.6 (34.2–36.2)	0.41

Results are expressed as means (95% confidence intervals).