Table 1 Baseline characteristics of pregnancies among women with or without juvenile idiopathic arthritis
With JIA (n = 549) | Without JIA (n = 2745) | p value | |||
|---|---|---|---|---|---|
Age at pregnancy, mean (SD), years | 24.4 | (3.4) | 24.4 | (3.4) | 1.00 |
< 25 | 298 | (54.3) | 1490 | (54.3) | |
25–34 | 251 | (45.7) | 1255 | (45.7) | |
Birth year, No. (%) | 1.00 | ||||
2004 | 14 | (2.6) | 70 | (2.6) | |
2005 | 19 | (3.5) | 95 | (3.5) | |
2006 | 25 | (4.6) | 125 | (4.6) | |
2007 | 21 | (3.8) | 105 | (3.8) | |
2008 | 28 | (5.1) | 140 | (5.1) | |
2009 | 46 | (8.4) | 230 | (8.4) | |
2010 | 35 | (6.4) | 175 | (6.4) | |
2011 | 52 | (9.5) | 260 | (9.5) | |
2012 | 84 | (15.3) | 420 | (15.3) | |
2013 | 86 | (15.7) | 430 | (15.7) | |
2014 | 139 | (25.3) | 695 | (25.3) | |
Male infant | 285 | (51.9) | 1396 | (50.9) | 0.65 |
Foreign nationals, No. (%) | 0 | 0 | 340 | (12.4) | |
Place of residence, No. (%) | 0.15 | ||||
Urban | 319 | (58.1) | 1536 | (56.0) | |
Suburban | 175 | (31.9) | 980 | (35.7) | |
Rural | 55 | (10.0) | 229 | (8.3) | |
Income levels, No. (%) | 0.79 | ||||
Quintile 1 | 128 | (23.3) | 691 | (25.2) | |
Quintile 2 | 140 | (25.5) | 726 | (26.5) | |
Quintile 3 | 138 | (25.1) | 664 | (24.2) | |
Quintile 4 | 94 | (17.1) | 445 | (16.2) | |
Quintile 5 | 49 | (8.9) | 219 | (8.0) | |
Occupation, No. (%) | 0.14 | ||||
Dependents | 182 | (33.2) | 1011 | (36.8) | |
Civil servants, teachers, military personnel, and veterans | 7 | (1.3) | 21 | (0.8) | |
Non-manual workers and professionals | 192 | (35.0) | 962 | (35.1) | |
Manual workers | 97 | (17.7) | 387 | (14.1) | |
Other | 71 | (12.9) | 364 | (13.3) | |
Charlson comorbidity index | 0.07 | (0.4) | 0.03 | (0.2) | < 0.05* |
0 | 525 | (95.6) | 2698 | (98.3) | |
1 | 19 | (3.5) | 40 | (1.5) | |
≥ 2 | 5 | (0.9) | 7 | (0.3) | |