Table 2.

AVN in pediatric SLE population as reported by various authors

Author	Definition of AVN	AVN/N (%)
Hurley et al. 1974 [5]	Radiographic findings; exact findings not defined. Performed only in symptomatic patients.	4/10 (40%)
Bergstein et al. 1974 [36]	Radiographic findings defined as: “mottling of the bone trabecular pattern, subchondral demineralization, depression or fragmentation, and irregular areas of lucency and/or sclerosis”. Performed in all patients.	14/35 (40%)
Brunner et al. 2002 [37]	No direct definition. Authors performed a retrospective chart review and calculated SLICC/ACR Damage Index score, which include AVN.	15/66 (22.7%)
Ravelli et al. 2003 [38]	No direct definition. Authors obtained information from calculated SLICC/ACR Damage Index score as well as retrospective chart review.	21/387 (5.4%)