Table 4.

Comparing psychosocial factors, ethnicity, and urban/rural residency between rheumatoid factor (RF) negative polyarticular juvenile arthritis (JA) and control groups.

FactorRF-negative Polyarticular JA, n (%)Controls, n (%)pOR (95% CI)
Univariate analysis
Parents separated (n = 848)*
  Yes15 (23.8)78 (9.9)0.0012.83 (1.52, 5.29)
  No48 (76.2)707 (90.1)
One or both parents deceased (n = 849)
  Yes2 (3.2)5 (0.6)0.0895.12 (0.97, 26.94)
  No61 (96.8)781 (99.4)
Member of family ill (n = 856)
  Yes6 (9.8)49 (6.2)0.1901.66 (0.68, 4.05)
  No55 (90.2)746 (93.8)
Serious upsets (n = 321)
  Yes9 (14.1)5 (1.9)< 0.00018.25 (2.66, 25.57)
  No55 (85.9)252 (98.1)
Significant losses (n = 319)
  Yes3 (4.8)5 (1.9)0.1892.56 (0.60, 11.03)
  No59 (95.2)252 (98.1)
Anyone close to the child died (n = 323)
  Yes9 (14.5)27 (10.3)0.3481.47 (0.65, 3.31)
  No53 (85.5)234 (89.7)
Problems getting along with others (n = 849)
  Yes10 (15.9)51 (6.5)0.0112.72 (1.31, 5.66)
  No53 (84.1)735 (93.5)
Mother employed outside home (n = 852)
  Yes29 (47.5)525 (66.4)0.0030.46 (0.27, 0.78)
  No32 (52.5)266 (33.6)
Ethnic groups (n = 887)
  Aboriginal19 (25.0)28 (3.5)< 0.00019.32 (4.91, 17.71)
  Caucasian or other57 (75.0)783 (96.5)
Urban/rural residence (n = 899)
  Rural51 (55.4)395 (48.9)0.2381.30 (0.84, 2.00)
  Urban41 (44.6)412 (51.1)
Lived in a city (n = 888)
  Yes29 (40.3)414 (50.7)0.0890.66 (0.40, 1.07)
  No43 (59.7)402 (49.3)
Multivariate analysis
  Parents separated0.0262.45 (1.12, 5.41)
  Any member of the family currently ill0.6031.31 (0.47, 3.67)
  Mother employed outside the home0.0250.50 (0.27, 0.91)
  Have problems getting along with others0.1072.04 (0.86, 4.88)
  Aboriginal< 0.00014.66 (1.98, 10.95)
  • * n values in left column = (number of patients with JA plus number of controls) minus missing data.