Table 1.
Previous studies of patients with LCPD who were treated conservatively
| Study | Followup (years) | Prevalence of THA | Definition of radiographic OA | Prevalence of OA |
|---|---|---|---|---|
| Gower and Johnston [2] | 36 | 3/36 hips (8%) | Not specified | 23/30 (77%) |
| Ippolito et al. [5] | 27 | 1/11 (9%) | Sclerosis, JSW narrowing, osteophytes | 10/10 (100%) |
| Ippolito et al. [6] | 25 | 0/61 (0%) | Sclerosis, JSW narrowing, osteophytes, cysts | Stulberg Class I: 0/8 (0%) Stulberg Class II: 0/17 (0%) Stulberg Class III: 9/25 (37%) Stulberg Class IV: 7/10 (70%) Stulberg Class V: 1/1 (100%) |
| Kelly et al. [10] | 22 | 2/80 (3%) | Not specified | 4/80 (5%) |
| Lecuire [12] | 50 | 12/51 hips (24%) | Not specified | 7/32 hips (22%) |
| Perpich et al. [14] | 29 | 3/38 (8%) | JSW less than 2 mm compared with other hip | 3/41 hips (7%) |
| Rush [15] | 26 | 0/35 (0%) | Not specified | Not specified |
| Stulberg et al. [16] | 40 | 0/171 (0%) | Sclerosis, JSW narrowing, osteophytes, cysts | Stulberg Class I: 0/20 (0%) Stulberg Class II: 2/30 (7%) Stulberg Class III: 10/28 (36%) Stulberg Class IV: 28/42 (67%) Stulberg Class V: 26/32 (81%) |
| Templeton and Green [18] | 32 | 0/37 (0%) | Not specified | Not specified |
| Yrjönen [20] | 35 | 0/19 (0%) | Not specified | 12/19 hips (63%) |
| Yrjönen et al. [21] | 35 | 5/106 (5%) | Sclerosis, JSW narrowing, osteophytes, cysts | 51/106 (48%) |