Table 6.

Logistic regression analysis of the risk factors for patients with multiple rib fractures receiving mechanical ventilation (n=101)

Risk factors	Univariate		Multivariate
	OR (95% CI)	p-value	OR (95% CI)	p-value
Age	2 (0.89–4.38)	0.093	2.06 (0.75–5.68)	0.163
Male sex	1.03 (0.38–2.75)	0.956
Mechanism of trauma
Motor vehicle collision	1.47 (0.55–3.93)	0.443
Car accident	1.27 (0.51–3.17)	0.616
Pedestrian	0.84 (0.31–2.31)	0.738
Motorcycle	0.58 (0.21–1.6)	0.294
Cultivator	2.57 (0.87–7.6)	0.089	1.97 (0.54–7.21)	0.307
Falls	0.68 (0.25–1.82)	0.443
Rib fractures >10	0.83 (0.37–1.84)	0.647
Both rib fractures	0.63 (0.28–1.42)	0.268
Sternal fracture	0.71 (0.28–1.84)	0.483
Pulmonary contusion
Mild	0.51 (0.2–1.33)	0.173
Moderate	0.59 (0.23–1.51)	0.272
Severe	2.37 (1.06–5.3)	0.035	3.07 (1.12–8.39)	0.029
Pneumothorax	0.9 (0.34–2.36)	0.83
Hemothorax	2.2 (0.41–11.91)	0.36
Hemopneumothorax	1.23 (0.49–3.11)	0.662
Bilateral	1.41 (0.54–3.71)	0.481
Other site injuries
Head and neck	0.88 (0.41–1.97)	0.785
Face	0.76 (0.33–1.71)	0.504
Abdomen	0.91 (0.34–2.48)	0.859
Extremity	0.91 (0.34–2.48)	0.86
External	1.2 (0.35–4.05)	0.774
Tracheostomy	2.33 (1.05–5.2)	0.038	2.42 (0.96–6.12)	0.061
Transfusion	2.11 (0.795–5.58)	0.134
Intensive care unit stay >15 days	1.95 (0.88–4.32)	0.099	1.64 (0.64–4.16)	0.302
TTSS >20	2.2 (0.98–4.91)	0.053	1.26 (0.44–3.59)	0.663
ISS >36	2.25 (1–5.04)	0.049	2.15 (0.87–5.32)	0.096

Multivariate analysis includes variables with significant associations in univariate analysis (p<0.1). Boldface indicates significant differences in statistical comparisons of baseline characteristics. Age, number of rib fractures, duration of mechanical ventilation, TTSS, and ISS are divided into 2 groups based on the median value.

OR, odds ratio; CI, confidence interval; TTSS, thorax trauma severity score; ISS, injury severity score.