JCSM.Figure1

Table 1. Descriptive statistics and variable types

Question or Variables	Scale Type	Mean, Median, or Mode°
Height	Continuous	70.29 in.
Weight	Continuous	240.1 lbs.
BMI	Continuous	33.94 kg/m2
Gender	Binary	91.8% Male
Overall Berlin Score	Binary	55.9% Positive
Have you ever nodded off or fallen asleep while driving a vehicle?	Binary	20.5% Yes
Do you have high blood pressure?	Binary	39.5% Yes
Do you snore?	Categorical	66.2% Yes
Does your snoring bother other people?	Categorical	43.4% Yes
How often do you snore?	Ordinal†	Median: 1-2 times a week
How often has someone noticed that you quit breathing during your sleep?	Ordinal	Median: Never or nearly never
How often do you feel tired or fatigued after your sleep?	Ordinal	Median: 1-2 times a month
During your waking time, how often do you feel fatigued, or not up to par?	Ordinal	Median: 1-2 times a month
How loud is your snoring?	Ordinal	Median: Slightly louder than breathing
†In our logistic regression analyses, ordinal variables were treated as univariate continuous variables ranging from 0- 4 where 0 was the lowest response and 4 was the highest response. ° The descriptive statistic was chosen based on the scale type of the variable in question. Continuous data, such as GPA or weight, is best described by its mean. Ordinal data, such as great, good, or bad, is best described by its median. Categorical data, such as gender or race, is best described by the mode[19].