Risks of postoperative respiratory failure in elderly patients after hip surgery: a retrospective study

Table 1 The baseline characteristics

	PRF group (n = 37)	Control group (n = 626)	χ²/t	P
Age (year)	73.03 ± 9.02	73.29 ± 9.09	− 0.169	0.866
Gender (male/female)	21/16	359/267	0.005	0.944
Fracture type
Femoral trochanteric fracture	23	296	0.006	0.997
Femoral neck fracture	14	330
Position
Left	20	355	0.100	0.752
Right	17	271

ISSN: 1749-799X