Relation between panoramic mandibular index and disease activity in patients with rheumatoid arthritis

Egyptian Rheumatology and Rehabilitation

Table 3 Comparison between the studied groups regarding T score of BMD and PMI

Parameter	Group I (n = 30)		Group II (n = 30)		Group III (n = 30)		Mann-Whitney U test	P-value
Parameter	Median	Mean ± SD	Median	Mean ± SD	Median	Mean ± SD	Mann-Whitney U test	P-value
DXA T score F	− 2.2	− 2.3 ± 1	− 1.2	− 1.2 ± 1	− 0.5	− 0.42 ± 1.2	2.5	0.01*
DXA **T score L1-4**	− 3.1	− 3.4 ± 1.5	− 2.1	− 2.4 ± 1.7	− 0.1	0.14 ± 1.4	5.6	0.001*
DXA **T score Forearm**	− 3.4	− 3.4 ± 1.5	− 4.4	− 4.6 ± 1.7	− 1	− 0.5 ± 1.3	2.4	0.03*
PMI	0.12	0.07 ± 0.06	0.16	0.17 ± 0.08	0.28	0.28 ± 0.1	4.1	0.007*

DEXA T score F, dual energy X-ray absorptiometry at the femur’s neck; DEXA T score L1-4, dual-energy X-ray absorptiometry at the lumber spines of the first four lumber vertebrae, PMI panoramic mandibular index