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Table 3 Risk analysis of a second (Recurrent) Henoch-Schönlein Purpura episode

From: Incidence and risk factors for recurrent Henoch-Schönlein purpura in children from a 16-year nationwide database

  Adjusted HR (95%CI)b p value
Demographic factors
 Age, y 1.01 (0.96–1.05) 0.791
Comorbidities
 Allergic rhinitis 1.63 (1.06–2.50) 0.026
Clinical course
 Renal symptoms 2.41 (1.64–3.54) < 0.001
Steroid initiation and duration(1st)
 No use record 1.00  
  Initiation < 14 days and Duration ≤ 10 days 0.40 (0.06–2.90) 0.366
  Initiation < 14 days and Duration > 10 days 8.13 (2.51–26.36) < 0.001
  Initiation ≥ 14 days and Duration ≤ 10 days 1.21 (0.83–1.76) 0.321
  Initiation ≥ 14 days and Duration > 10 days 4.06 (2.76–5.96) < 0.001
  1. bHazard ratio of 1.00 indicates reference group