Table 3.

Multivariate analysis on the risk factors of drowning in children based on the training dataset

	OR	95% CI	P value	P for trend*
Age (X1)
8≦X1 < 10	2.42	1.63~3.58	< 0.01	< 0.01
10≦X1 < 12	2.35	1.97~2.80	< 0.01
12≦X1 < 14	1.45	1.21~1.74	< 0.01
14≦X1 < 18	1.00
Gender (X2)
Male	1.44	1.24~1.66	< 0.01
Female	1.00
Swimming skill level (X3)
≧100 m	2.12	1.72~2.62	< 0.01	< 0.01
50–100 m	1.42	1.19~1.69	< 0.01
< 50 m	1.48	1.22~1.79	< 0.01
Unable to swim	1.00
Personality (X4)
Introvert	1.26	1.00~1.59	< 0.05
Extrovert	1.12	0.92~1.37	> 0.05
Between intro and extro	0.84	0.65~1.09	> 0.05
Do not know	1.00
Relationships with classmates (X5)
Very good	0.57	0.39~0.84	< 0.01	0.07
Good	0.59	0.40~0.88	< 0.01
Not good	1.03	0.63~1.67	> 0.05
Bad	1.00
Relationships with family (X6)
Very good	0.27	0.17~0.44	< 0.01	< 0.01
Good	0.34	0.21~0.56	< 0.01
Not good	0.54	0.31~0.95	< 0.05
Bad	1.00
Have open water on the way to school (X10)
Yes	0.76	0.63~0.91	< 0.01
No	0.69	0.58~0.82	< 0.01
Do not know	1.00

^* Only for variables with three or more levels