Table 6. Predictors of LBP among the study population using multivariate logistic regression .

Variables	OR	95% CI	P
Gender
Boy	1.0	(referent)
Girl	1.48	(1.23–1.79)	0.002
Family member with back pain
No	1.0	(referent)
Yes	1.82	(1.40–2.36)	0.001
Viewing the (black)board
Very easy	1.0	(referent)
Neutral	1.22	(0.79–1.90)	0.367
Very difficult	1.50	(1.13–1.99)	0.005
Homework
Just right	1.0	(referent)
Not enough	1.32	(0.90–1.96)	0.159
Too much	1.47	(1.09–1.99)	0.013
Time spent carrying schoolbag (min/d)
≤30	1.0	(referent)
30–60	1.37	(1.01–1.85)	0.043
>60	1.52	(1.10–2.11)	0.011
Emotional symptoms
Low	1.0	(referent)
Medium	1.22	(0.81–1.84)	0.341
High	2.28	(1.54–3.39)	0.001

Abbreviations: LBP, low back pain; OR, odds ratio.