Learning Curve and Clinical Outcomes of Performing Surgery with the InterTan Intramedullary Nail in Treating Femoral Intertrochanteric Fractures

Table 1

Baseline characteristics.

Variable	Early group	Later group	p
Age, mean (95% CI) (years)	80.56 (77.13 to 83.98)	80.26 (77.75 to 82.76)	0.886
Male : female (number)	8 : 10	14 : 21	0.756
Fracture side (right/left) (number)	7 : 11	17 : 18	0.502
Fracture type (AO/OTA) (number)			0.949
A1	5	10
A2	10	18
A3	3	7
Diabetes (number)	2	5	0.75
Hypertension (number)	2	10	0.15
Heart failure (number)	1	0	0.47
Coronary artery disease (number)	1	0	0.16
Chronic cerebral infarction (number)	1	5	0.49
Atrial fibrillation (number)	0	1	0.47
Pulmonary infection (number)	1	4	0.34
ASA score (number)			0.453
1	0	1
2	13	18
3	5	15
4	0	1

ASA, American Society of Anesthesiologists; CI, confidence interval;
AO/OTA, Arbeitsgemeinschaft für Osteosynthesefragen/Orthopaedic Trauma Association.