Table 2.

Survivorship of operatively-treated acetabular fractures according to fracture type and other characteristics

	Survivorship (95% Confidence Interval) (%)
	Two Years	Five Years	Ten Years	Twenty Years	Median Time to Failure
Entire series (n = 816)	91 (90–92)	88 (87–90)	85 (84–87)	79 (76–81)	1.5
Elementary fracture type (n = 241)	91 (89–93)	86 (84–89)	84 (81–87)	73 (68–79)	1.3
Anterior wall (n = 12)	91 (82–100)	68 (53–84)	68 (53–84)	34 (9–59)	2.3
Anterior column (n = 80)	95 (92–97)	92 (88–95)	87 (83–91)	77 (70–85)	3.0
Posterior wall (n = 107)	88 (84–91)	82 (78–86)	81 (77–85)	76 (71–82)	1.2
Posterior column (n = 14)	100	100	100	100	–
Transverse (n = 28)	89 (83–95)	89 (83–95)	89 (83–95)	89 (83–95)	0.3
Associated fracture type (n = 575)	92 (91–93)	89 (88–91)	86 (84–87)	80 (78–83)	1.6
Posterior column, posterior wall (n = 26)	85 (78–92)	85 (78–92)	85 (78–92)	85 (78–92)	0.5
Transverse, posterior wall (n = 143)	89 (86–91)	85 (82–88)	81 (78–85)	74 (68–80)	1.5
T-shaped (n = 96)	89 (85–92)	85 (81–89)	77 (72–81)	74 (65–84)	1.6
Ant. column, post. Hemitrans. (n = 76)	92 (89–95)	92 (89–95)	88 (84–92)	75 (65–84)	1.3
Both columns (n = 234)	96 (94–97)	83 (91–95)	91 (89–93)	87 (83–90)	2.2
Initial displacement
≥ 20 mm (n = 226)	86 (84–89)	84 (81–86)	78 (75–81)	68 (63–73)	1.3
≤ 20 mm (n = 590)	93 (92–95)	90 (89–91)	88 (86–89)	83 (81–85)	1.9
Treatment delay
< 21 days (n = 730)	93 (92–94)	89 (88–91)	86 (85–88)	79 (77–82)	2.0
> 21 days (n = 86)	82 (78–86)	80 (75–84)	74 (69–79)	74 (69–79)	0.9
Previous surgery
Yes (n = 5)	60 (38–82)	30 (6–54)	–	–	0.8
No (n = 811)	92 (91–93)	89 (87–90)	85 (84–87)	79 (77–81)	1.6
Age
< 40 yr. (n = 386)	96 (95–97)	95 (94–96)	92 (91–94)	87 (84–89)	2.3
40–65 yr. (n = 318)	88 (86–90)	83 (81–86)	81 (79–83)	74 (71–77)	1.3
> 65 yr. (n = 112)	83 (79–87)	79 (75–83)	70 (65–76)	51 (38–64)	0.8
> 75 (n = 42)	80 (73–87)	74 (66–83)	65 (54–76)	–	0.6