Table 3. Associations between linkage accuracy and maternal characteristics.
| True matches N = 6593 n (%) |
Missed-matches N = 2620 n (%) |
OR(95%CI) |
p-value | |
|---|---|---|---|---|
| Age of the mother in years | ||||
| Mean age | 28.4 | 28.7 | - | 0.127 |
| Marital status | ||||
| Single | 3,615 (54.8) | 1,427 (54.5) | 1 | |
| Married | 2,264 (34.3) | 914 (34.9) | 0.98(0.89–1.1) | |
| Divorced/widow | 148 (2.3) | 68 (2.6) | 0.85 (0.64–1.1) | 0.611 |
| Missing | 566 (8.6) | 211 (8.0) | ||
| Maternal education | ||||
| 8 or more years | 2,236 (33.9) | 750 (28.6) | 1 | <0.001 |
| 4–7 years | 1,773 (26.9) | 699 (26.7) | 0.85 (0.75–0.96) | |
| Less than 3 years | 1,009 (15.3) | 510 (19.5) | 0.66 (0.58–0.76) | |
| Missing | 1,575 (23.9) | 661 (25.2) | ||
| Self-identified race | ||||
| White | 2,322 (35.2) | 846 (32.3) | 1 | 0.005 |
| Mixed and black | 3,787 (57.4) | 1,583 (60.4) | 0.87 (0.79–0.96) | |
| Others | 91 (1.4) | 51 (1.9) | 0.65 (0.45–0.92) | |
| Missing | 393 (6.0) | 140 (5.3) | ||
| Period of Pregnancy | ||||
| Pregnant | 1,173 (17.8) | 1,331 (50.8) | 1 | 0.001 |
| Puerperium | 4,870 (73.9) | 993 (37.9) | 5.5 (5.0–6.1) | |
| Missing | 550 (8.3) | 296 (11.3) |