Table 4. Results of cardiopulmonary... | American Society of Hematology

Table 4.

Results of cardiopulmonary exercise tests at follow-up by health status (n = 54)

Characteristic	No underlying conditions, n = 27∗	Underlying conditions present, n = 27∗	P value†
Age (y) at the time of exercise test	16.8 (15.6, 17.5)	16.8 (15.5, 17.6)	.79
VO₂ peak, z score	−0.73 (−1.53, −0.16)	−1.68 (−2.80, −0.80)	.042
Abnormal VO₂ peak z score‡	5 (19%)	12 (44%)	.040
Percent peak heart rate (bpm)	93 (91, 97)	92 (86, 97)	.16
Peak workload (watts)	145 (130, 193)	144 (123, 166)	.26
Peak SPO₂	99 (99, 100)	99 (99, 100)	.95
Exercise desaturation	1 (3.7%)	0 (0%)	>.99

Characteristic	No underlying conditions, n = 27∗	Underlying conditions present, n = 27∗	P value†
Age (y) at the time of exercise test	16.8 (15.6, 17.5)	16.8 (15.5, 17.6)	.79
VO₂ peak, z score	−0.73 (−1.53, −0.16)	−1.68 (−2.80, −0.80)	.042
Abnormal VO₂ peak z score‡	5 (19%)	12 (44%)	.040
Percent peak heart rate (bpm)	93 (91, 97)	92 (86, 97)	.16
Peak workload (watts)	145 (130, 193)	144 (123, 166)	.26
Peak SPO₂	99 (99, 100)	99 (99, 100)	.95
Exercise desaturation	1 (3.7%)	0 (0%)	>.99

bpm, beats per minute.

Median (25th-75th percentile); n (%).

Wilcoxon rank sum test; Fisher exact test; Pearson χ² test.

Abnormal defined by a z score of −1.96 or less.