Table 1.
Population Characteristics, N = 167 (single injection)
| 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 |
*Wilcoxon Rank-Sum tests or Chi-squared/Fisher’s Exact Tests between CHOP and TSRH sites, alpha = 0.05
Missing:
aSymptom age start, n = 30 missing
bKnee Symptom age start, n = 33 missing
cDisease duration, n = 38 missing
dIritis, n = 59 missing (35%)
SMD: standardized mean difference. SMD > 0.25 (25%) indicates an imbalance between our groups, P < 0.05 is considered statistically significant (shown in bold)