All women | Neural tube/Central nervous system | Cardiac | Renal | Limb | Lip/Cleft/Palate | Chromosomal | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | n (%) | χ 2 | n (%) | χ 2 | n (%) | χ 2 | n (%) | χ 2 | n (%) | χ 2 | n (%) | χ 2 | |
Maternal age (years) | 0.9 | <0.01 | 0.07 | 0.5 | 0.9 | <0.01 | |||||||
<20 | 31 259 | 31 (9.8) | 39 (8.2) | 7 (5.2) | 42 (11.8) | 18 (8.5) | 14 (8.1) | ||||||
20–35 | 244 425 | 238 (75.5) | 340 (71.4) | 111 (82.8) | 278 (78.5) | 162 (76.8) | 91 (52.9) | ||||||
>35 | 25 583 | 46 (14.7) | 97 (20.4) | 16 (12.0) | 34 (9.7) | 31 (14.7) | 67 (39.0) | ||||||
Missing | 868 | ||||||||||||
Marital Status | 0.6 | 0.09 | 0.3 | 0.7 | 0.09 | 0.5 | |||||||
Single | 30 583 | 35 (11.2) | 32 (6.8) | 10 (7.5) | 38 (10.8) | 12 (5.8) | 15 (8.8) | ||||||
Married | 268 051 | 278 (88.8) | 440 (93.2) | 124 (92.5) | 314 (89.2) | 194 (94.2) | 155 (91.2) | ||||||
Missing | 3 501 | ||||||||||||
Education (years) | 0.4 | <0.01 | 0.9 | <0.01 | <0.01 | 0.8 | |||||||
<5 | 54 693 | 55 (18.5) | 13 (3.2) | 13 (10.1) | 38 (12.4) | 16 (8.6) | 13 (8.8) | ||||||
5–8 | 62 952 | 68 (23.0) | 60 (14.8) | 22 (17.0) | 70 (22.9) | 41 (21.8) | 24 (16.3) | ||||||
9–11 | 71 550 | 88 (29.7) | 166 (41.0) | 40 (31.0) | 105 (34.3) | 77 (40.9) | 53 (36.1) | ||||||
>11 | 88 274 | 85 (28.8) | 165 (41.0) | 54 (41.9) | 93 (30.4) | 54 (28.7) | 57 (38.8) | ||||||
Missing | 24 666 | ||||||||||||
N previous births | 0.3 | 0.2 | 0.5 | 0.4 | 0.2 | <0.01 | |||||||
0 | 128 479 | 123 (39.0) | 208 (43.6) | 52 (38.5) | 161 (45.2) | 76 (36.2) | 58 (33.5) | ||||||
1–2 | 125 401 | 135 (42.9) | 216 (45.3) | 63 (46.7) | 156 (43.8) | 97 (46.2) | 78 (45.1) | ||||||
>2 | 47 672 | 57 (18.1) | 53 (11.1) | 20 (14.8) | 39 (11.0) | 37 (17.6) | 37 (21.4) | ||||||
Missing | 583 |