Bone erosion in the 2nd metacarpophalangeal head: association with its bone mineral density by HR-pQCT in rheumatoid arthritis patients

Table 3 The sample was categorized by the presence or not of bone erosions in 2nd MCP head

Variables	Absence of Erosion (N = 24)	Presence of Erosion (N = 26)	P
Age, years	39.7 ± 6.3	40.6 ± 5.5	0.594
Disease duration, years	10.7 ± 5.3	11.2 ± 4.4	0.831
DAS-28	2.5 ± 1.3	2.6 ± 0.8	0.815
SDAI	12.8 ± 8.8	10.2 ± 8.0	0.271
HAQ	1.0 ± 0.7	0.7 ± 0.6	0.271
Hand Grip, N	18.6 ± 7.8	17.6 ± 6.5	0.670
Number of Osteophyte	0.1 ± 0.4	0.5 ± 0.8	0.028^a
BMD of MCP head, mg/cm³	321.5 ± 37.1	281.3 ± 67.6	0.043^a
Joint space width, mm³	93.5 ± 36.9	68.2 ± 28.3	0.025^a
Radio
Ct.vBMD, mg HA/cm³	875.1 ± 58.7	865.5 ± 70.1	0.602
Tb.vBMD, mg HA/cm³	147.4 ± 39.1	155.6 ± 43.6	0.109
Tibia
Ct.vBMD, mg HA/cm³	925.7 ± 33.3	905.2 ± 49.5	0.215
Tb.vBMD, mg HA/cm³	139.2 ± 32.2	149.2 ± 34.6	0.382

The results are expressed as mean ± standard deviation (SD). DAS-28 Disease activity score 28, SDAI Simplified disease activity index, HAQ Health assessment questionnaire, BMD Bone mineral density. MCP Metacarpophalangeal, Ct.vBMD Cortical volumetric bone mineral density, Tb.vBMD Trabecular volumetric bone mineral density. ^aStatistical significance

ISSN: 1471-2474