Which of the following is a type of observational study that analyzes population-level data?
AEcological study
BCase-control study
CRandomized controlled trial
DLongitudinal study
A 40-year-old man presents with daytime sleepiness and impaired concentration and memory. On examination his BMI is 41 kg/m2, BP is 160/100 mm Hg. His awake ABG analysis is given: PaO2=66 mm Hg, PaCO2=50 mm Hg, HCO3=28 mEq/L. What is the most likely diagnosis?
AObstructive sleep apnea
BNarcolepsy
CObesity hypoventilation syndrome
DCentral sleep apnea
Berger waves (alpha waves) of EEG have a rhythm of how many Hz?
A0-4 Hz
B4-7 Hz
C8-13 Hz
D13-30 Hz
+ 7 more in the PDF
Browse all chapters