Table 4. Sample characteristics.

sample characteristics		SMS system
		Off	On	Total
Total n [%]		1505 [50.6]	1467 [49.4]	2972 [100]
Mean age [SD]		42.27 ±18.7	42.51 ± 19.2	42 ± 18.9
Gender n [%]	M	806 [50.7]	784 [49.3]	1590 [53.5]
	F	699 [50.6]	683 [49.4]	1382 [46.5]
Load n [%]	1	1040 [49.9]	1043 [50.1]	2083 [70.1]
	2	274 [49.7]	277 [50.3]	551 [18.5]
	3	191 [56.5]	147 [43.4]	338 [11.4]
Triage category n [%]	2	28 [60.9]	18 [39.1]	46 [1.5]
	3	720 [50.4]	709 [49.6]	1429 [48.1]
	4	562 [52.5]	508 [47.5]	1070 [36.0]
	5	193 [45.4]	232 [54.6]	425 [14.3]