Table 2.

Odds Ratios as for Pain More Likely to Occur as the Number of Hours Increases with the Use of Each Instrument

Odds Ratios of Pain with Increasing Use of Device (Number of Hours) and Increasing Activity
Activity	Type of Pain	Odds Ratio	Lower CI 95%	Upper CI 95%	P-value
Hours per Week Spent Using Surgical Loupes	Chronic Shoulder Pain	1.44	0.94	2.33	0.094
	Chronic Upper Back Pain	1.53	0.96	2.589	0.078
Hours per Week Spent Using a Slit Lamp	Chronic Elbow Pain	1.31	0.99	1.732	0.057
	Chronic Upper Back Pain	1.23	0.99	1.525	0.06
How Many Surgeries Performed a Week	Chronic Wrist Pain	1.38	1.09	1.76	0.008**
How Many Years of Practice	Chronic Neck Pain	1.22	1.02	1.48	0.03*
	Chronic Lower Back apin	1.34	1.1	1.67	0.003**

Notes: *p<0.05. **p<0.01.