Analyses of possible risk factors for subacromial impingement syndrome

Table 3 Multivariable analysis demonstrating independent risk factors associated with impingement syndrome

Characteristics	Crude odds ratios (95% CI)	Adjusted odds ratios (95% CI)
Age, yr
< 50	1	1
≥ 50	1.73 (1.01-2.96)	1.83 (0.87-3.81)
Sex
Male	1	1
Female	0.58 (0.35-0.95)	0.58 (0.28-1.18)
BMI (kg/m2)
< 25	1	1
25-29.9	1.01 (0.61-1.69)	1.31 (0.68-2.54)
≥ 30	1.41 (0.53-3.74)	1.13 (0.24-5.31)
Smoking status
Never	1	1
Current	7.37 (2.30-22.86)	6.78 (1.15-39.82)
Ex-smoker	1.47 (0.32-6.73)	1.84 (0.34-9.93)
Occupation	1	1
Rubber tapper	1.70 (0.70-4.14)	0.81 (0.27-2.46)
Teacher/nurse	1.16 (0.38-3.56)	0.71 (0.18-2.73)
Farmer	5.00 (1.28-19.49)	6.28 (1.30-30.29)
Officer/others	0.74 (0.33-1.68)	0.44 (0.16-1.20)
Sport
None	1	1
Jogging	1.80 (0.35-9.01)	2.60 (0.42-16.06)
Football	0.45 (0.05-4.08)	1.39 (0.11-17.29)
Others	2.70 (0.74-9.79)	2.81 (0.57-13.87)
Type of acromion
Type I, flat	1	1
Type II, curved	1.06 (0.50-2.26)	1.10 (0.47-2.58)
Type III, hooked	5.73 (1.09-12.73)	6.24 (1.11-34.96)
Sleeping position
Supine	1	1
Decubitus	2.06 (1.23-3.44)	3.74 (1.20-11.59)
Undetermined	1.71 (0.67-4.33)	2.35 (1.17-4.72)

BMI: Body mass index.