JCSM.Figure1

From Ben Works
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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].