Table 2.

Differencese in T2 values and WORMS scores at time points baseline to 6 years

	Ethnicity
	African Americans		Caucasian Americans
	mean	95% CI	mean	95% CI	p
Baseline
Average T2 (ms)	32.07	31.7–32.4	32.85	32.5–33.2	<0.0001
WORMS sum	7.79	6.47–9.12	7.57	6.58–8.56	0.755
Cartilage sum	3.61	2.97–4.23	3.62	2.96–4.28	0.969
BMEP sum	1.81	1.37–2.24	1.35	0.99–1.71	0.069
Meniscus sum	0.9	0.54–1.26	1.36	0.89–1.83	0.065
Medial Meniscus sum	0.34	0.16–0.52	0.61	0.38–0.84	0.031
Lateral Meniscus sum	0.56	0.25–0.87	0.75	0.33–1.16	0.379
24 months
WORMS sum	33.49	33.2–33.8	33.97	33.8–34.4	0.617
Average T2 (ms)	8.66	6.91–10.39	8.91	7.44–10.38	0.687
Cartilage sum	4.29	3.47–5.11	4.54	3.69–5.38	0.556
BMEP sum	2.17	1.60–2.74	1.71	1.25–2.16	0.231
Meniscus sum	0.66	0.18–1.13	1.42	0.82–2.02	0.003
Medial Meniscus sum	0.26	0.02–0.49	0.55	0.26–0.84	0.017
Lateral Meniscus sum	0.4	−0.01–0.8	0.87	0.34–1.40	0.034
48 months
WORMS sum	34.16	33.8–34.5	34.43	34.2–34.9	0.259
Average T2 (ms)	12.15	10.48–13.82	10.93	8.98–12.89	0.268
Cartilage sum	5.88	5.09–6.67	5.75	4.90–6.60	0.749
BMEP sum	2.83	0.28–3.38	2.02	1.56–2.48	0.024
Meniscus sum	1.39	0.94–1.85	1.85	1.25–2.45	0.252
Medial Meniscus sum	0.49	0.27–0.71	0.74	0.44–1.03	0.287
Lateral Meniscus sum	0.9	0.52–1.29	1.11	0.58–1.65	0.506
72 months
WORMS sum	34.08	33.7–34.5	34.23	33.9–34.7	0.386
Average T2 (ms)	13.84	11.88–15.79	12.38	9.57–15.19	0.251
Cartilage sum	6.79	5.87–7.71	6.44	5.45–7.43	0.866
BMEP sum	3.09	2.44–3.73	2.11	1.58–2.65	0.065
Meniscus sum	1.54	1.01–2.08	2.02	1.32–2.72	0.639
Medial Meniscus sum	0.63	0.37–0.89	0.87	0.52–1.21	0.216
Lateral Meniscus sum	0.91	0.46–1.37	1.15	0.54–1.78	0.871

Significants of differences were tested with the paired t test, level of confidence p < 0,05. Part of baseline data were reported in Yu et al. 2015⁷