Table 3.
Co-occurrence of trends in ABO and individual-level variables for white women
| Variables and trend type | Decreasing | No trend | Increasing | |
|---|---|---|---|---|
| Prior preterm birth rate | ||||
| ABO rate | Decreasing (n = 54)a | 1 (2%)b | 38 (70%) | 15 (28%) |
| No trend (n = 1248) | 34 (3%) | 731 (58%) | 483 (39%) | |
| Increasing (n = 116) | 4 (4%) | 55 (47%) | 57 (49%) | |
| Woman’s age ≥ 35 rate | ||||
| ABO rate | Decreasing (n = 54) | 8 (15%) | 42 (78%) | 4 (7%) |
| No trend (n = 1248) | 156 (12%) | 996 (80%) | 96 (8%) | |
| Increasing (n = 116) | 13 (11%) | 93 (80%) | 10 (9%) | |
| Woman’s age < 20 rate | ||||
| ABO rate | Decreasing (n = 54) | 20 (37%) | 34 (63%) | 0 (0%) |
| No Trend (n = 1248) | 385 (31%) | 839 (67%) | 24 (2%) | |
| Increasing (n = 116) | 24 (21%) | 88 (76%) | 4 (3%) | |
| Cigarette use rate | ||||
| ABO rate | Decreasing (n = 54) | 9 (17%) | 44 (82%) | 1 (2%) |
| No trend (n = 1248) | 162 (13%) | 1056 (85%) | 30 (2%) | |
| Increasing (n = 116) | 17 (15%) | 87 (75%) | 12 (10%) | |
| Chronic hypertension rate | ||||
| ABO rate | Decreasing (n = 54) | 2 (4%) | 38 (70%) | 14 (26%) |
| No trend (n = 1248) | 7 (1%) | 704 (56%) | 537 (43%) | |
| Increasing (n = 116) | 1 (1%) | 54 (46%) | 61 (53%) | |
| Gestational hypertension rate | ||||
| ABO rate | Decreasing (n = 54) | 4 (7%) | 47 (87%) | 3 (6%) |
| No trend (n = 1248) | 57 (4%) | 1071 (86%) | 120 (10%) | |
| Increasing (n = 116) | 1 (1%) | 90 (77%) | 25 (22%) | |
| Gestational diabetes rate | ||||
| ABO rate | Decreasing (n = 54) | 0 (0%) | 41 (76%) | 13 (24%) |
| No trend (n = 1248) | 7 (1%) | 902 (72%) | 339 (27%) | |
| Increasing (n = 116) | 1 (1%) | 83 (71%) | 32 (28%) | |
The most notable co-occurrences are highlighted in bold
aThe number of census tracts with a particular trend type
bThe number and percent of census tracts in each cross-tabulation category