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. 2019 Jul 27;20:348. doi: 10.1186/s12891-019-2725-7

Table 2.

Descriptive table for patients’ characteristics and surgery information by HO class

Variables Total (N = 151) HO class 0 (N = 38) HO class 1 (N = 43) HO class 2 (N = 55) HO class 3+ (N = 15) P-values
Days to surgery 2 ± 3 2 ± 1 2 ± 3 2 ± 3 6 ± 6 0.0015
Age 81 ± 11 82.5 ± 16 83 ± 11 80 ± 11 77 ± 10 0.2812
Gender Female 113 (74.83%) 34 (30.09%) 32 (28.32%) 38 (33.63%) 9 (7.96%) 0.0705
Male 38 (25.17%) 4 (10.53%) 11 (28.95%) 17 (44.74%) 6 (15.79%)
Surgical Approach Anterolateral 4 (2.65%) 0 (0.00%) 3 (75.00%) 1 (25.00%) 0 (0.00%) 0.1882
Lateral 33 (21.85%) 5 (15.15%) 8 (24.24%) 15 (45.45%) 5 (15.15%)
Posterior 114 (75.50%) 33 (28.95%) 32 (28.07%) 39 (34.21%) 10 (8.77%)
Side of surgery Left 82 (54.30%) 20 (24.39%) 24 (29.27%) 28 (34.15%) 10 (12.20%) 0.7383
Right 69 (45.70%) 18 (26.09%) 19 (27.54%) 27 (39.13%) 5 (7.25%)

*For categorical variables, p-value was based on Chi-squared test with exact p-value from Monte Carlo simulation; for continuous variables, median +/− interquartile range were reported and p-value was based on Kruskal-Wallis test