Table 5. Univariate testing of other factors that can cause apathy or hypersomnia.

See Table 2 for methodology and interpretation of symbols

	Control Patients (n=166)	Hypersomnia (n=12)	Apathy (n=44)
Infection during stay:
By Billing Code	22% (16 – 29%)	42% (15 – 72%)	32% (19 – 48%)
By Antibiotic Initiation	34% (27 – 42%)	50% (21 – 79%)	*59% (43 – 74%)
By One Elevated WBC	20% (15 – 27%)	33% (10 – 65%)	*39% (24 – 55%)
New diagnosis of depression:
By Billing Code	39% (31 – 46%)	*92% (62 – 100%)	57% (41 – 72%)
By Antidepressant Initiation	25% (18 – 32%)	*75% (43 – 95%)	*50% (35 – 65%)
Sedating Medication	8% (4 – 13%)	8% (0 – 38%)	14% (5 – 27%)