Adverse Health Effects and Unhealthy Behaviors among Medical Students Using Facebook

Table 6

Association between adverse health effects and facebook surfing hours.

Health effects	𝑁 (%)	Mean rank	Sum of ranks	𝑃 value
Back pain
Yes	226 (75.3)	158.13	35737.00	0.006
No	74 (24.7)	127.20	9413.00
Shoulder/neck pain
Yes	224 (74.7)	160.27	35901.00	0.001
No	76 (25.3)	121.70	9249.00
Wrist pain
Yes	197 (65.7)	157.09	30946.50	0.060
No	103 (34.3)	137.90	14203.50
Headache
Yes	207 (69.0)	158.95	32903.00	0.009
No	93 (31.0)	131.69	12247.00
Eye irritation
Yes	220 (73.3)	158.25	34814.50	0.008
No	80 (26.7)	129.19	10335.50