Table 2. Patient Characteristics.

Variable	Early case (n = 25)	Late case (n = 25)	p-value
Age (yr)	64.7 ± 15.2	66.1 ± 19.8	0.769
Sex (male:female)	6:19	7:18	1.000
Garden classification			1.000
Type 1	22	21
Type 2	3	4
BMI	21.3 ± 3.3	20.5 ± 4.4	0.511
BMD	0.671 ± 0.134	0.721 ± 0.156	0.449
T-score	−2.2 ± 1.1	−1.9 ± 1.3	0.484
No. of failures	0	0	NA
Operating time (min)	52.2 ± 15.2	38.4 ± 13.0	0.001

Values are presented as mean ± standard deviation.

BMI: body mass index, BMD: bone mineral density, NA: not available.