Table 2.
Characteristics of 104 women treated with VZIG during pregnancy from December 2005 to March 2015 compared to the Danish population of women aged 15–45 years
| Characteristic | Study population, % (n) | Danish population, % (n) | P value* | |
|---|---|---|---|---|
| Maternal age, yr | Mean | 30·6 years | 30·9 years† | 0·70 |
| ⩽19 | 0 (0) | 1·4 (880) | ||
| 20–24 | 19·6 (11) | 11·1 (6 959) | ||
| 25–29 | 27·9 (29) | 30·2 (18 907) | ||
| 30–34 | 43·3 (45) | 36·4 (22 841) | ||
| 35–39 | 14·4 (15) | 17·7 (11 123) | ||
| 40–44 | 2·9 (3) | 3 (1 893) | ||
| ⩾45 | 0 (0) | 0·1 (95) | ||
| Missing | 1·0 (1) | — | ||
| Parity | Primipara | 19·2 (20) | 44·8 (27 809)‡ | <0·001 |
| 2nd para | 56·7 (59) | 36·9 (22 918) | ||
| 3rd para | 16·3 (17) | 13·7 (8497) | ||
| 4th para | 1·9 (2) | 3·3 (2025) | ||
| ⩾5th para | 2·9 (3) | 1·4 (874) | ||
| Missing | 2·9 (3) | — | ||
| Country of origin | Denmark | 62·5 (65) | 87·7 (909 562)‡ | <0·001 |
| Immigrants | 34·6 (36) | 12·3 (128 085) | ||
| North and West Europe | 4·8 (5) | 2·4 (24 928) | ||
| South and East Europe | 9·6 (10) | 3·1 (31 994) | ||
| Asia | 11·5 (12) | 2·2 (22 846) | ||
| Middle East | 6·8 (7) | 3·2 (33 111) | ||
| Northern America | 0 (0) | 0·2 (2370) | ||
| Oceania | 1·0 (1) | 0·1 (717) | ||
| South and Central America | 1·0 (1) | 0·3 (3591) | ||
| Sub-Saharan Africa | 0 (0) | 0·8 (8270) | ||
| Missing | 2·9 (3) | 0·02 (256) | ||
| Mother's number of siblings | 0 | 11·5 (12) | ||
| 1 | 37·5 (39) | |||
| 2 | 27·9 (29) | |||
| ⩾3 | 17·3 (18) | |||
| Missing | 5·8 (6)§ | |||
| History of institutional care | Any kind of institutional care | 61·5 (64) | ||
| Only day care | 4·8 (5) | |||
| Only nursery | 1·0 (1) | |||
| Only kindergarten | 21·2 (22) | |||
| Combination of several institutions | 34·6 (36) | |||
| None | 23·1 (24) | |||
| Missing | 15·4 (16) | |||
| Smoking | Smoked during pregnancy | 9·6 (10) | ||
| Non-smoker | 75·0 (78) | |||
| Quit smoking | 23·1 (24) | |||
| Never smoked | 51·9 (54) | |||
| Missing | 15·4 (16) |
VZIG, Varicella-zoster immunoglobulin.
*
χ2 test for homogeneity.
†
Mean age for women giving birth in Denmark 2010. Data from National Birth Statistics, 2012, Statens Serum Institut.
‡
Data from Statistics Denmark, Statistikbanken, 2010.
§
Missing values because the woman's parents never lived in Denmark and did not have a CRS number.