Table 2.
Co-occurrence of trends in ABO and individual-level variables for black women
| Variables and trend type | Decreasing | No trend | Increasing | |
|---|---|---|---|---|
| Prior preterm birth rate | ||||
| ABO rate | Decreasing (n = 84)a | 24 (29%)b | 60 71%) | 0 (0%) |
| No trend (n = 1230) | 56 (5%) | 1116 (91%) | 58 (4%) | |
| Increasing (n = 104) | 3 (3%) | 20 (19%) | 81 (78%) | |
| Woman’s age ≥ 35 rate | ||||
| ABO rate | Decreasing (n = 84) | 8 (10%) | 68 (81%) | 8 (9%) |
| No trend (n = 1230) | 10 (1%) | 1052 (85%) | 168 (14%) | |
| Increasing (n = 104) | 1 (1%) | 24 (23%) | 79 (76%) | |
| Woman’s age < 20 rate | ||||
| ABO rate | Decreasing (n = 84) | 44 (52%) | 39 (47%) | 1 (1%) |
| No trend (n = 1230) | 243 (20%) | 979 (79%) | 8 (1%) | |
| Increasing (n = 104) | 4 (4%) | 46 (44%) | 54 (52%) | |
| Cigarette use rate | ||||
| ABO rate | Decreasing (n = 84) | 51 (61%) | 33 (39%) | 0 (0%) |
| No trend (n = 1230) | 271 (22%) | 955 (78%) | 4 (0%) | |
| Increasing (n = 104) | 4 (4%) | 45 (44%) | 54 (52%) | |
| Chronic hypertension rate | ||||
| ABO rate | Decreasing (n = 84) | 12 (14%) | 72 (86%) | 0 (0%) |
| No trend (n = 1230) | 22 (2%) | 1111 (90%) | 97 (8%) | |
| Increasing (n = 104) | 2 (2%) | 20 (19%) | 82 (79%) | |
| Gestational hypertension rate | ||||
| ABO rate | Decreasing (n = 84) | 23 (28%) | 59 (70%) | 2 (2%) |
| No trend (n = 1230) | 36 (3%) | 1146 (93%) | 48 (4%) | |
| Increasing (n = 104) | 0 (0%) | 31 (30%) | 73 (70%) | |
| Gestational diabetes rate | ||||
| ABO rate | Decreasing (n = 84) | 13 (16%) | 69 (82%) | 2 (2%) |
| No trend (n = 1230) | 13 (1%) | 1104 (90%) | 113 (9%) | |
| Increasing (n = 104) | 0 (0%) | 20 (19%) | 84 (81%) | |
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