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

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

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 0.028a
BMD of MCP head, mg/cm3 321.5 ± 37.1 281.3 ± 67.6 0.043a
Joint space width, mm3 93.5 ± 36.9 68.2 ± 28.3 0.025a
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
  1. 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