Table 4.

Post-education knowledge scores compared between control and intervention subgroups

Variable	Control			Intervention			p-value
	n	Mean	Standard deviation	n	Mean	Standard deviation
Age (years)
< 36	32	65.31	17.22	39	78.21	13.93	< 0.001
≥ 36	40	58.75	18.97	31	65.48	16.30	0.120
Sex
Female	29	66.21	12.93	34	71.47	17.43	0.185
Male	43	58.61	20.88	36	73.61	15.15	< 0.001
Education
< High school	13	44.62	18.98	8	66.25	15.06	0.013
≥ High school	59	65.42	16.12	62	73.39	16.29	0.008
Injury severity score
≦4	55	62.91	18.43	57	74.39	16.48	< 0.001
> 4	17	57.65	18.21	13	64.62	12.66	0.249
Transferred
Yes	16	58.75	17.84	19	72.11	14.75	0.021
No	56	62.50	18.61	51	72.75	16.86	0.004
Arrival time
8–16 h	30	61.00	16.47	36	72.22	18.07	0.011
Others	42	62.14	19.82	34	72.94	14.26	0.009
Physician
Physician A	18	65.00	14.65	16	71.13	20.24	0.186
Physician B	7	58.57	24.78	10	73.00	13.37	0.140
Physician C	14	57.86	18.05	6	70.00	10.95	0.146
Physician D	11	60.00	23.24	12	74.17	13.79	0.087
Physician E	9	67.78	14.81	14	72.14	18.88	0.564
Physician F	13	60.00	19.15	12	71.67	16.42	0.117