Table 1.

Demographic information and clinical characteristics.

Variable	All Patients (n = 174)	Normal RVP (n = 167)	Elevated RVP (n = 7)	P
Age, y	8.9 (5.5–13.1)	8.9 (5.5–13.2)	10.5 (5.9–12.2)	.55
Male	103 (59.2)	100 (59.9)	3 (42.9)	.45
Race/ethnicity				.70
Hispanic	72 (41.4)	70 (41.9)	2 (28.6)
Non-Hispanic Black	45 (25.9)	42 (25.1)	3 (42.9)
Non-Hispanic White	9 (5.2)	8 (4.8)	1 (14.3)
Asian	1 (0.6)	1 (0.6)	0
Other	15 (8.6)	15 (9.0)	0
Unknown	32 (18.4)	31 (18.6)	1 (14.3)
BMI percentile*	98.9 (90.2–99.7)	98.9 (89.3–99.6)	99.8 (93.0–99.9)	.25
Underweight	9 (5.2)	9 (5.4)	0
Normal weight	30 (17.2)	29 (17.4)	1 (14.3)
Overweight	8 (4.6)	7 (4.2)	1 (14.3)
Mild obesity	32 (18.4)	32 (19.2)	0
Moderate obesity	36 (20.7)	34 (20.4)	2 (28.6)
Severe obesity	53 (30.5)	50 (29.9)	3 (42.9)
Obesity	121 (72.0)	116 (72.0)	5 (71.4)	>.99
Tonsils and/or adenoids removed	29 (16.7)	27 (16.2)	2 (28.6)	.33
OSAS severity				.08†
Mild (1 ≤ AHI  < 4.9 events/h)	4 (2.3)	4 (2.4)	0
Moderate (5 ≤ AHI  < 10 events/h)	8 (4.6)	6 (3.6)	2 (28.6)
Severe (10 ≤ AHI  < 30 events/h)	78 (44.8)	76 (45.5)	2 (28.6)
Very severe (AHI  ≥ 30 events/h)	84 (48.3)	81 (48.5)	3 (42.9)

Categorical variables are presented as counts and percentages. Continuous variables are presented as median (interquartile range). P values were calculated using Mann-Whitney U, Fisher’s exact, or chi-square test between groups as appropriate. *BMI percentile (and therefore obesity status) was unavailable or unspecified (due to age 20+) for 6 patients, all of whom had normal RVP. BMI percentile was categorized as follows: underweight (< 5%), normal weight (5%–84%), overweight (85%–94%), mild obesity (95%–119% of 95th percentile), moderate obesity (120%–139% of 95th percentile), and severe obesity (> 140% of 95th percentile). ^†P value was calculated for severe OSAS (AHI ≥ 10 events/h) vs nonsevere OSAS (AHI < 10 events/h). AHI = apnea-hypopnea index, BMI = body mass index, OSAS = obstructive sleep apnea syndrome, RVP = right ventricular pressure.