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Table 1 Population Characteristics, N = 167 (single injection)

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) CHOP (N = 72) TSRH (N = 95) P-value SMD
Sex - Female 136 (81%) 58 (81%) 78 (82%) 0.80 0.04
Age, years 6.7 (3.8–10.5) 7.5 (4.8–11.3) 5.6 (3.5–9.8) 0.0416 0.32
Race     0.06 0.36
Black/AA 5 (3%) 2 (3%) 3 (3%)   
White 149 (90%) 60 (85%) 89 (94%)   
Other 12 (7%) 9 (13%) 3 (3%)   
White (vs. nonwhite) 149 (90%) 60 (85%) 89 (94%) 0.0327 0.33
Ethnicity – Hispanic (vs not) 25 (15%) 8 (11%) 17 (18%) 0.25 0.19
Symptom Age Start, yearsa 4.6 (2.3–8.7) 5.7 (3.8–9.8) 3.9 (2.1–8.2) 0.04333 0.35
Knee Symptom Age Start, yearsb 5.6 (3.2–9.7) 6.3 (3.5–10.1) 5.0 (2.9–9.2) 0.43 0.14
Diagnosis age 4.0 (2.5–6.8) 4.8 (2.5–7.5) 3.6 (2.5–6.0) 0.15 0.22
Disease duration, yearsc 0.58 (0.29–2.71) 0.40 (0.22–1.32) 0.74 (0.34–3.09) 0.0141 0.44
Systolic Blood Pressure 106.0 (101.0–115.5) 109.0 (102.0–118.5) 106.0 (100.0–114.0) 0.27 0.19
Diastolic Blood Pressure 63.0 (57.0–66.0) 63.0 (59.0–66.0) 62.0 (57.0–66.0) 0.38 0.15
Iritis – Yesd 4 (4%) 1 (2%) 3 (5%) 1.00 0.11
  1. *Wilcoxon Rank-Sum tests or Chi-squared/Fisher’s Exact Tests between CHOP and TSRH sites, alpha = 0.05
  2. Missing:
  3. aSymptom age start, n = 30 missing
  4. bKnee Symptom age start, n = 33 missing
  5. cDisease duration, n = 38 missing
  6. dIritis, n = 59 missing (35%)
  7. SMD: standardized mean difference. SMD > 0.25 (25%) indicates an imbalance between our groups, P < 0.05 is considered statistically significant (shown in bold)