Table 1.

Frequency and anatomical distribution of SIJ quadrants with BMO in 2 cohorts of athletes

Cohort	SIJ quadrants	Upper Ilium		Lower Ilium		Upper Sacrum		Lower Sacrum

		Anterior	Posterior	Anterior	Posterior	Anterior	Posterior	Anterior	Posterior

HR before	Mean (SD)	0.1 (0.4)	0.1 (0.3)	0.2 (0.7)	1.4 (1.9)	0.5 (0.9)	0.1 (0.4)	0.3 (0.6)	0.5 (1.6)
	≥1 Q (n)	3	0	1	8	4	2	3	1
	≥2 Q (n)	0	0	1	6	3	0	0	1
	≥3 Q (n)	0	0	1	2	1	0	0	1
	≥4 Q (n)	0	0	0	1	0	0	0	1
HR after	Mean (SD)	0.2 (0.4)	0 (0.1)	0.3 (0.8)	1.2 (1.7)	0.5 (1.0)	0.2 (0.7)	0.3 (0.7)	0.5 (1.6)
	≥1 Q (n)	2	0	2	9	3	2	3	1
	≥2 Q (n)	0	0	1	6	2	1	0	1
	≥3 Q (n)	0	0	1	3	2	0	0	1
	≥4 Q (n)	0	0	1	1	0	0	0	1
IP	Mean (SD)	0.1 (0.4)	0.1 (0.3)	0.5 (0.8)	1.9 (1.9)	0.6 (1.1)	0.1 (0.4)	0.2 (0.6)	0.1 (0.6)
	≥1 Q (n)	0	1	7	13	3	0	3	0
	≥2 Q (n)	0	0	4	11	2	0	1	0
	≥3 Q (n)	0	0	0	6	2	0	0	0
	≥4 Q (n)	0	0	0	3	1	0	0	0

Abbreviations. Q: SIJ quadrants with BMO. ≥1/2/3/4 Q (n): number of subjects (n) with ≥2/3 readers indicating ≥1/2/3/4 SIJ quadrants with BMO.