Table 2.

  Characteristics during and after surgery for patients with hip fracture according to type of treatment. Figures are numbers* (percentages) of patients unless stated otherwise

	Internal fixation	Hemiarthroplasty	Mean difference or relative risk (95% CI)	P value
Perioperative details
Mean (SD) time from admission to surgery (hours)	25.3 (15.34) (n=111)	31.4 (22.32) (n=107)	6.10† (0.96 to 11.23)	0.02
Mean (SD) time in operation theatre (minutes)	107 (44.90) (n=109)	167 (34.06) (n=102)	60.4† (49.5 to 71.3)	<0.001
Mean (SD) time of surgery (minutes)	26 (20.18) (n=110)	76 (19.01) (n=107)	49.3† (44.1 to 54.6)	<0.001
Mean (SD) intraoperative blood loss (ml)	35 (86.67) (n=110)	348 (203.64) (n=107)	313.1† (271.4 to 354.8)	<0.001
Main surgeons >3 years experience with procedure	77 (69) (n=111)	67 (62) (n=109)	1.13 (0.93 to 1.37)	0.22
Spinal anaesthesia	106 (96) (n=111)	103 (95) (n=108)	1.00 (0.95 to 1.06)	0.97
Hospital stay
Received blood transfusion while admitted	15 (14) (n=111)	35 (32) (n=109)	0.42 (0.24 to 0.73)	0.001
Any medical complication	28 (25) (n=111)	30 (28) (n=109)	0.92 (0.59 to 1.43)	0.70
Postoperative confusion	17 (15) (n=111)	20 (18) (n=109)	0.84 (0.46 to 1.51)	0.55
Mean (SD) hospital stay (days)	8.2 (7.35) (n=111)	10.2 (11.95) (n=109)	1.98 (−0.66 to 4.61)	0.14
Cognitive function
Cognitive failure at 4 months (MMSE-12 score <10)	44 (49) (n=89)	42 (50) (n=84)	0.99 (0.73 to 1.33)	0.94
Mortality
Within 30 days	7 (6) (n=112)	10 (9) (n=110)	0.68 (0.27 to 1.73)	0.42
Within 90 days	16 (14) (n=112)	20 (18) (n=110)	0.77 (0.43 to 1.44)	0.43
Within 12 months	24 (21) (n=112)	29 (26) (n=110)	0.81 (0.51 to 1.30)	0.39
Within 2 years	39 (35) (n=112)	39 (35) (n=110)	0.98 (0.69 to 1.40)	0.92

*Number varies because some information was missing for some patients.

†Mean difference.