Table 5.

Harris hip scores and heterotopic ossifications

Author	n of patients	Mean Harris hip score preoperatively	Mean Harris hip score postoperatively	Hips with heterotopic ossification, % (n)
Park et al. [36]	25	48.7	85.1	24 (6)
Luo et al. [29]	101	48.5	90	5 (5)
Yang et al. [45]	49	45.0	84,8	6 (3)
Wang et al. [43]	56	44.2	87.5	11 (6)
Zeng et al. [48]	45	48,1	87.6	9 (4)
Kim et al. [20]	62	55	89
Yoo et al. [46]	38	57	91
Lian et al. [26]	52	62	91.6
Lim and Park [27]	58	49.5	89.2	5 (3)
Kim et al. (cementless group) [18]	116	50	89	9 (10)
Kim et al. (cemented hybrid group) [18]	45	50	85	13 (6)
Kim [16]	44	57.6	90.4	2 (1)