Table 2.

Physiological response and procedures performed upon arrival at the emergency department.

Variable (Fall < 1 m)	Patients ≥ 65 y/o with Hyponatremia n = 492		Patients ≥ 65 y/o without Hyponatremia n = 2002		Patients 20–64 y/o with Hyponatremia n = 125		OR (95% CI) p Patients ≥ 65 y/o with Hyponatremia vs. Patients ≥ 65 y/o without Hyponatremia			OR (95% CI) p Patients ≥ 65 y/o with Hyponatremia vs. Patients 20–64 y/o with Hyponatremia
Physiology at ED, n (%)
GCS < 13	37	(7.5)	121	(6.0)	15	(12.0)	1.3	(0.86–1.85)	0.255	0.6	(0.32–1.13)	0.147
SBP < 90 mmHg	9	(1.8)	18	(0.9)	34	(27.2)	2.1	(0.92–4.60)	0.087	0.1	(0.02–0.11)	<0.001
Heart rate > 100 beats/min	86	(17.5)	324	(16.2)	2	(1.6)	1.1	(0.85–1.43)	0.497	13.0	(3.16–53.70)	<0.001
Procedures at ED, n (%)
Intubation	12	(2.4)	21	(1.0)	4	(3.2)	2.4	(1.15–4.83)	0.025	0.8	(0.24–2.39)	0.752
Chest tube insertion	1	(0.2)	7	(0.3)	0	(0.0)	0.6	(0.07–4.73)	0.708	-		1.000
Blood transfusion	18	(3.7)	48	(2.4)	3	(2.4)	1.5	(0.89–2.68)	0.156	1.5	(0.45–5.33)	0.593

ED = emergency department; GCS = Glasgow Coma Scale; SBP = systolic blood pressure. The values with significant difference between groups are expressed in bold.