Table 2.

Baseline graded exercise performance by sickle cell trait status

	Adjusted mean (95% CI)
	No SCT	SCT	P value*
No.	1859	136
Duration, sec	539.9 (535.1-544.6)	535.2 (517.6-552.8)	.62
Estimated METs	11.7 (11.6-11.8)	11.6 (11.4-11.9)	.80
Maximum heart rate, beats/min	175.1 (174.3-175.8)	173.8 (171.0-176.7)	.41
HR recovery at 2 min, beats/min	43.3 (42.8-43.8)	44.3 (42.5-46.2)	.28

Models adjusted for age, sex, baseline physical activity, and BMI.

^*P values for comparisons between SCT and No SCT (reference).