Table 6. Multivariate model for association between NSP in High School Students.

	NSP OR (95% CI)
Gender: Female	1.293(1.108-1.509)
High school year
1	0.931(0.789-1.098)
2	1
3	1.335(1.056-1.687)
Frequency of feeling soreness after exercise
Almost never	1
Occasionally	1.464(1.223-1.752)
Often	2.211(1.730-2.825)
Always	2.069(1.365-3.137)
Often sitting in front of a PC without moving much for more than 1.5 hours	1.243(1.063-1.454)
Type of PC used: laptop	1.366(1.167-1.599)
Eye-to-screen distance while using a PC
< 20 cm	1
20 cm-25 cm	1.068(0.794-1.436)
25 cm-30 cm	1.471(1.103-1.962)
> 30 cm	1.437(1.069-1.931)
Tablet use	1.311(1.117-1.538)
Continue sitting after school every day over 3 hours	1.854(1.561-2.202)
Feeling depressed	1.821(1.546-2.146)
Not satisfied with academic performance	1.390(1.191-1.622)

NSP = neck/shoulder pain; OR = ORs after multiple logistic regression with forward stepwise selection.