TABLE 2.

Description of daytime drowsiness in individuals involved in phase 2 of the Saskatchewan Farm Injury Cohort Study, 2013

Variable	Excessive daytime sleepiness (n=376)		Diagnosed sleep apnea (n=100)		No excessive daytime sleepiness or sleep apnea (n=2018)
	Response, mean ± SD	≥ Moderate*, % (95% CI)	Response, mean ± SD	≥ Moderate* % (95% CI)	Response, mean ± SD	≥ Moderate* % (95% CI)
Epworth Sleepiness Scale score (range 0–24)	13.5±2.6	20 (16–24)†	8.7 (4.5)	N/A	5.1 (2.8)	N/A
Lying down to rest in the afternoon when circumstances permit	2.7±0.5	97 (96–99)	2.2 (0.9)	77 (68–85)	1.5 (1.0)	50 (48–53)
Watching television	2.5±0.7	93 (90–95)	1.8 (0.9)	66 (57–75)	1.2 (0.9)	34 (32–36)
Sitting and reading	2.2±0.8	79 (74–83)	1.4 (1.1)	40 (31–50)	0.8 (0.8)	16 (15–18)
As a passenger in a car for an hour without a break	2.0±0.9	70 (65–74)	1.2 (1.0)	37 (27–47)	0.8 (0.8)	18 (16–20)
Sitting quietly after lunch without alcohol	1.9±0.9	67 (63–72)	1.1 (1.0)	26 (16–35)	0.5 (0.7)	10 (8–11)
Sitting, inactive in a public place	1.4±0.9	44 (38–49)	0.8 (0.9)	18 (9–27)	0.2 (0.5)	2 (1–2)
Sitting and talking to someone	0.5±0.7	7 (5–10)	0.2 (0.4)	1 (0–3)	0.0 (0.2)	0 (0–0)
In a car, while stopped for a few minutes in traffic	0.3±0.7	7 (4–10)	0.1 (0.4)	3 (0–7)	0.0 (0.2)	0 (0–0)

^*Respondents who answered 2 or 3 on a subscale ranging from 0 to 3 – individual item response options were: 0 = would never doze, 1 = slight chance of dozing, 2 = moderate chance of dozing, 3 = high chance of dozing (95% CI, adjusted for clustering of individuals within farms);

^†Percentage of respondents with an Epworth Sleepiness Scale score ≥16, indicative of severe daytime somnolence. N/A Not applicable