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Table 5 Population Characteristics, N = 167 (single injection) stratified by Arthritis Reoccurrence Status

From: Retrospective review of immobilization vs. immediate resumption of activity in patients with Oligoarticular juvenile idiopathic arthritis following knee injections

N(%) or Median (25th–75th)  
  All (N = 167) No Reoccurrence of Arthritis (N = 112) Arthritis Reoccurrence (N = 55) P-value* SMD
Sex – Female 136 (81%) 92 (82%) 44 (80%) 0.74 0.05
Age, year 6.7 (3.8–10.5) 6.6 (3.6–10.4) 7.1 (4.0–10.6) 0.84 0.03
Race     0.40 0.22
Black/AA 5 (3%) 2 (2%) 3 (5%)   
White 149 (90%) 100 (90%) 49 (89%)   
Other 12 (7%) 9 (8%) 3 (5%)   
White (vs. nonwhite) 149 (90%) 100 (90%) 49 (89%) 0.97 0.01
Ethnicity – Hispanic (vs not) 25 (15%) 17 (15%) 8 (15%) 0.88 0.02
Symptom Age Start 4.6 (2.3–8.7) 4.8 (2.5–8.9) 4.1 (2.2–8.2) 0.50 0.13
Knee Symptom Age Start 5.6 (3.2–9.7) 5.6 (3.1–9.6) 5.7 (3.3–10.3) 0.50 0.13
Diagnosis age 4.0 (2.5–6.8) 4.2 (2.5–6.9) 3.9 (2.6–6.0) 0.61 0.09
Systolic Blood Pressure 106.0 (101.0–115.5) 106.0 (99.0–115.0) 106.5 (102.0–116.0) 0.31 0.25
Diastolic Blood Pressure 63.0 (57.0–66.0) 62.0 (57.0–66.0) 64.0 (59.0–66.0) 0.17 0.24
Iritis – Yes* 4 (4%) 2 (3%) 2 (5%) 0.61 0.13
  1. *Wilcoxon Rank-Sum tests or Chi-squared/Fisher’s Exact Tests between Arthritis reoccurrence 1 vs 0, alpha = 0.05
  2. **Iritis data, n = 70 missing (36%)
  3. SMD: standardized mean difference