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Table 4 Baseline characteristics of the latent classes

From: Discordant inflammation and pain in early and established rheumatoid arthritis: Latent Class Analysis of Early Rheumatoid Arthritis Network and British Society for Rheumatology Biologics Register data

  ERAN BSRBR TNF inhibitor cohort BSRBR control cohort
Concordant/Discordant Con Con Con Dis Dis Heterogeneity Con Con Dis Dis Heterogeneity Con Con Dis Dis Heterogeneity
Descriptor Mild Moderate Severe Better patient-reported Worse patient-reported   Moderate Severe Better patient-reported Worse patient-reported   Mild Moderate Better patient-reported Worse patient-reported  
Age 58 (13) 56 (14) 55 (14) 58 (13) 57 (13)   56 (13) 56 (12) 57 (14) 56 (12) * 60 (12) 61 912) 59 (12) 59 (12) *
Female 60% 68% 65% 66% 81% * 72% 79% 75% 77% * 69% 73% 71% 77% *
DAS28 3.2 (1.1) 4.3 (1.0) 6.9 (0.8) 6.0 (0.7) 5.7 (0.8) * 5.6 (0.9) 7.5 (0.7) 7.0 (0.7) 6.2 (0.7) * 4.1 (1.1) 4.9 (1.0) 7.0 (0.8) 5.7 (1.0) *
HAQ 0.4 (0.5) 1.1 (0.6) 1.8 (0.6) 1.3 (0.6) 1.8 (0.7) * 2.0 (0.6) 2.0 (0.6) 2.1 (0.6) 2.0 (0.6)   0.7 (0.6) 1.5 (0.6) 1.8 (0.6) 2.1 (0.5) *
  1. Clinical variables not used in the latent class analysis are compared between identified latent classes. Mean (SD) or percentage data are presented
  2. Abbreviations: BSRBR, British Society for Rheumatology Biologics Registers, DAS28 28-joint Disease Activity Score, ERAN Early Rheumatoid Arthritis Network, HAQ Health Assessment Questionnaire, TNF Tumour necrosis factor, Dis Discordant, Con Concordant
  3. *p < 0.05 from one-way analysis of variance for heterogeneity between latent classes within one cohort