Lifestyle factors before and during pregnancy in anti-Ro/SSA positive women
| CHB pregnancies | Non-CHB pregnancies | OR (95% CI) | p Value | p Trend | |
| I. Outdoor activity during daytime*,†, % (frequency) | 0.01 | ||||
| A few hours/day | 48 (37/77) | 64 (64/100) | 0.52 (0.27 to 0.99) | 0.04 | |
| A few hours/week | 43 (33/77) | 31 (31/100) | 1.66 (0.85 to 3.25) | 0.12 | |
| A few hours/month or never‡ | 9 (7/77) | 5 (5/100) | 1.89 (0.49 to 7.90) | 0.37 | |
| II. Sun exposure*, % (frequency) | |||||
| Increased sun exposure | 5 (4/79) | 2 (2/108) | 2.81 (0.39 to 31.82) | n.s | |
| Decreased sun exposure | 21 (16/76) | 24 (25/106) | 0.86 (0.39 to 1.86) | n.s | |
| Sunbathing outside | n.s | ||||
| daily | 13 (10/79) | 15 (16/106) | 0.82 (0.31 to 2.05) | n.s | |
| regularly | 27 (21/79) | 25 (26/106) | 1.11 (0.53 to 2.28) | n.s | |
| sparsely | 37 (29/79) | 37 (39/106) | 1.00 (0.51 to 1.90) | n.s | |
| never | 24 (19/79) | 24 (25/106) | 1.03 (0.48 to 2.14) | n.s | |
| Solarium | n.s | ||||
| A few times /week | 0 (0/80) | 1 (1/108) | 0.67 (0.01 to 13.04)§ | n.s | |
| A few times/month | 5 (4/80) | 5 (5/108) | 1.08 (0.20 to 5.22) | n.s | |
| never | 95 (76/80) | 95 (102/108) | 1.12 (0.25 to 5.58) | n.s | |
| Trip abroad with increased sun exposure | 10 (8/77) | 8 (9/108) | 1.27 (0.40 to 3.93) | n.s | |
| III. Infections* and stressful events*, % (frequency) | |||||
| Infectious disease¶ | 28 (21/76) | 2 (2/97) | 17.87 (4.11 to 162.84) | 0.00013 | |
| Stressful event** | 11 (8/76) | 2 (2/97) | 5.54 (1.05 to 55.08) | 0.02 | |
*Before week 25 of pregnancy,
† Examples given were games, sports, walks, gardening, work.
‡ Categories few hours/month and never were combined in the table; none answered never.
§Haldane’s correction was used for calculation.
¶ Includes respiratory tract infections, gastrointestinal tract infections and skin infections.
**Death or severe disease of a close relative or own severe disease.
CHB, congenital heart block.