Table 4.

The endorsement of each SDI item (frequency ≥2), percentage rated as being moderately to markedly severe (severity ≥2), and percentage rated as moderately to extremely distressing (staff distress ≥3), in accordance with Tractenberg et al. (30).

Symptom	% Endorsement	% Moderate/ marked severity	% Moderate/ extreme distress
Difficulty falling asleep	25.43	16.95	13.56
Getting up during the night	33.90	27.12	25.42
Wandering, pacing or getting involved in inappropriate activities at night	30.51	23.73	25.42
Awakening at night	45.76	30.51	23.73
Awakening at night, dressing, and planning to go out, thinking that it is morning and time to start the day	11.86	8.48	6.78
Awakening too early in the morning (earlier than is his/her habit)	8.48	3.39	1.70
Sleeping excessively during the day	33.90	13.56	3.39

SDI, Sleep Disorder Inventory.

Frequency ratings: 0 = not present; 1 = less than once per week; 2 = 1–2 times per week; 3 = several times per week but less than every day; 4 = once or more per day (every night). Severity ratings: 0 = not present; 1 = mild; 2 = moderate; 3 = marked. Staff distress ratings: 0 = not at all; 1 = minimally; 2 = mildly; 3 = moderately; 4 = severely; 5 = very severely/extremely (30).