Table 1 Characteristics of RPGEH Prenatal Cohort Participants Compared to Non-Participants in Kaiser Permanente Northern California
Overall Denominator (n = 93,409) | Participants (n = 16,977) | Non-Participants (n = 76,432) | |
|---|---|---|---|
Characteristic | N (%) | ||
Agea | |||
18–24 | 14,590 (15.6) | 2,456 (15.1) | 12,134 (15.9) |
25–29 | 25,685 (27.5) | 4,769 (28.1) | 20,916 (27.4) |
30–34 | 32,469 (34.8) | 6,158 (36.3) | 26,311 (34.4) |
35–39 | 16,574 (17.7) | 2,940 (17.9) | 13,634 (17.8) |
40 or older | 4,065 (4.4) | 653 (3.8) | 3,412 (4.5) |
Unknown | 26 (<0.1) | 1 (<0.1) | 25 (<0.1) |
Race/Ethnicity | |||
Non-Hispanic White | 36,704 (39.3) | 7,975 (47.0) | 28,729 (37.6) |
Hispanic | 22,578 (24.2) | 3,909 (23.0) | 18,669 (24.4) |
Asian | 22,413 (24.0) | 3,264 (19.2) | 19,149 (25.0) |
African American | 6,448 (6.9) | 960 (5.6) | 5,488 (7.2) |
Other | 3,965 (4.2) | 691 (4.1) | 3,274 (4.3) |
Unknown | 1,301 (1.4) | 178 (1.1) | 1,123 (1.5) |
Parity | |||
0 | 58,395 (62.5) | 10,312 (60.7) | 48,083 (62.9) |
1 | 26,210 (28.1) | 5,030 (29.6) | 21,180 (27.7) |
2+ | 8,804 (9.4) | 1,635 (9.6) | 7,169 (9.4) |
Pre-pregnancy BMI (kg/m2) | |||
< 18.5 | 1919 (2.4) | 276 (1.9) | 1,643 (2.5) |
18.5–24.9 | 36,957 (46.2) | 6,607 (44.8) | 30,350 (46.5) |
25.0–29.9 | 20, 758 (25.9) | 4,013 (27.2) | 16,745 (25.6) |
30.0+ | 17,132 (21.4) | 3546 (24.0) | 13,586 (20.8) |
Unknown | 3,320 (4.2) | 315 (2.1) | 3,005 (4.6) |
Gestational age at initiation of prenatal care | |||
1st trimester | 83,551 (89.5) | 16,041 (94.5) | 67,510 (88.3) |
2nd trimester | 6,707 (7.2) | 722 (4.3) | 5,985 (7.8) |
3rd trimester | 2,980 (3.2) | 141 (0.8) | 2,839 (3.7) |
Unknown | 171 (0.2) | 73 (0.4) | 98 (0.1) |
Length of enrollment before pregnancy (years) | 8.9 (8.6) | 10.0 (9.1) | 8.6 (8.5) |
Length of enrollment after pregnancy (years) | 2.5 (1.2) | 2.7 (1.3) | 2.5 (1.2) |