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. 2013 Oct 11;8(10):e78109. doi: 10.1371/journal.pone.0078109

Table 5. Depressive Symptoms, Studying Stress and the Risks of NSP and LBP in High School Students.

N % With NSP P Value NSP OR (95% CI) % With LBP P Value LBP OR (95% CI)
Continue sitting after school every day 0 0
< 3 h 2230 36.2% 1 30.9% 1
> 3 h 786 53.7% 2.04 (1.73-2.41) 39.2% 1.44 (1.21-1.70)
I feel depressed 0 0
No 2059 35.6% 1 26.7% 1
Yes 957 51.7% 1.93 (1.66-2.26) 46.9% 2.43 (2.07-2.85)
I’m satisfied with studying every day 0.03 0.01
No 1746 42.4% 1 34.9% 1
Yes 1270 38.5% 0.85 (0.73-0.99) 30.6% 0.82 (0.70-0.96)
I am satisfied with my academic performance 0 0
No 1540 45.1% 1 37.5% 1
Yes 1476 36.2% 0.69 (0.60-0.80) 28.5% 0.66 (0.59-0.77)
CES-D score 0 0
< 16 1994 38.8% 1 29.1% 1
≥ 16 767 46.0% 1.34 (1.14-1.59) 43.9% 1.91 (1.61-2.27)

NSP = neck/shoulder pain; LBP = lower back pain; OR = ORs after univariate logistic regression.