Comparing psychosocial factors, ethnicity, and urban/rural residency between rheumatoid factor (RF) positive polyarticular juvenile arthritis (JA) and control groups.
| Factor | RF-positive Polyarticular JA, n (%) | Controls, n (%) | p | OR (95% CI) |
|---|---|---|---|---|
| Univariate analysis | ||||
| Parents separated (n = 500)* | ||||
| Yes | 0 (0.0) | 1 (0.2) | 0.975 | — |
| No | 14 (100.0) | 553 (99.8) | ||
| Member of family ill (n = 576) | ||||
| Yes | 3 (16.7) | 43 (7.7) | 0.167 | 2.39 (0.67, 8.60) |
| No | 15 (83.3) | 515 (92.3) | ||
| Serious upsets (n = 214) | ||||
| Yes | 1 (5.9) | 5 (2.5) | 0.395 | 2.40 (0.26, 21.81) |
| No | 16 (94.1) | 192 (97.5) | ||
| Significant losses (n = 212) | ||||
| Yes | 0 (0.0) | 5 (2.6) | 0.673 | — |
| No | 16 (100.0) | 191 (97.4) | ||
| Anyone close to the child died (n = 218) | ||||
| Yes | 2 (11.1) | 23 (11.5) | 0.659 | 0.96 (0.21, 4.45) |
| No | 16 (88.9) | 177 (88.5) | ||
| Problems getting along with others (n = 574) | ||||
| Yes | 2 (10.5) | 38 (6.8) | 0.387 | 1.60 (0.36, 7.19) |
| No | 17 (89.5) | 517 (93.2) | ||
| Mother employed outside home (n = 573) | ||||
| Yes | 6 (37.5) | 370 (66.4) | 0.016 | 0.30 (0.11, 0.85) |
| No | 10 (62.5) | 187 (33.6) | ||
| Ethnic groups (n = 594) | ||||
| Aboriginal | 7 (31.8) | 21 (3.7) | < 0.0001 | 12.24 (4.52, 33.20) |
| Caucasian or other | 15 (68.2) | 551 (96.3) | ||
| Urban/rural residence (n = 595) | ||||
| Rural | 16 (59.3) | 248 (43.7) | 0.111 | 1.88 (0.86, 4.12) |
| Urban | 11 (40.7) | 320 (56.3) | ||
| Lived in a city (n = 595) | ||||
| Yes | 7 (30.4) | 322 (56.3) | 0.014 | 0.34 (0.14, 0.84) |
| No | 16 (69.6) | 250 (43.7) | ||
| Multivariate analysis | ||||
| Mother employed outside the home | 0.252 | 0.52 (0.17, 1.60) | ||
| Live in a city | 0.160 | 0.42 (0.12, 1.41) | ||
| Aboriginal | < 0.0001 | 10.80 (3.22, 36.29) | ||
↵* n values in left column = (number of patients with JA plus number of controls) minus missing data.