Table 3.

Comparison of demographics, lung function, asthma severity, and OSA characteristics among BMI categories for patients with OSA information available.

	Normal weight BMI: 18.5–24.9 (N = 50)	Overweight BMI: 25.0 – 29.9 (N = 62)	Obese BMI >= 30 (N = 133)	P-value*
Demographics
Age (yrs)	40 (14)	41 (14)	43 (13)	0.34
Female, N (%)	35 (70%)	40 (65%)	96 (72%)	0.54
Race, N (%)				0.81
White	29 (58%)	34 (55%)	64 (48%)
Black	17 (34%)	23 (37%)	56 (42%)
Other	4 (8%)	5 (8%)	13 (10%)
Lung function
FEV1 % predicted	76.5 (16.7)	78.5 (14.1)	78.0 (16.5)	0.95
FVC % predicted	90.8 (16.6)	91.2 (14.9)	85.4 (15.5)	0.02
FEV1/FVC	84.6 (13.7)	86.7 (11.1)	91.4 (10.3)	0.002
Asthma severity
JAC	2.22 (0.80)	2.06 (0.68)	2.35 (0.79)	0.13
ASUI	0.78 (0.66 to 0.85)	0.79 (0.74 to 0.89)	0.71 (0.55 to 0.84)	0.049
OSA characteristics
Sleep apnea, N (%)+	0 (0%)	4 (6%)	23 (17%)	< 0.001
Snoring, N (%)‡	25 (50%)	41 (66%)	107 (80%)	< 0.001
Witnessed apneas, N (%)‡‡	3 (6%)	8 (13%)	29 (22%)	0.02
Day time naps, N (%)‡¶	12 (24%)	12 (19%)	48 (36%)	0.04
CPAP/BIPAP use, N (%)	0 (0%)	1 (2%)	8 (6%)	0.12

^*p value reported for Kruskal-Wallis test for continuous variables, and Fisher’s exact test for proportions

⁺participants responded yes/no to the question “Have you ever been diagnosed with sleep apnea?”

^‡participants participants responded yes/no to the question “Have you ever been told you snore?”

^‡‡participants responded yes/no to the question “Has anyone ever noticed that you stop breathing during your sleep?”

^¶Participants responded yes/no to the question “Do you often take naps during the day?”