| Matched memorial care data | Unmatched Memorial Care data | p-value* | Matched birth certificate data | Unmatched birth certificate data | p-value** | |
---|---|---|---|---|---|---|---|
 | Valid matching variables | Missing matching variables |  |  | Valid matching variablesa |  | |
N | 62200 | 4162 | 6138 | Â | 62200 | 9312 | Â |
Rate of preeclampsia (2001–2006 data) | 3.13 | 3.73 | 4.12 | <0.01 | 1.38 | 1.97 | <0.01 |
Rate of preeclampsia (2001–2005 data) | 3.12 | 3.70 | 4.12 | <0.01 | 1.34 | 1.75 | <0.01 |
Rate of preeclampsia (2006 data only) | 3.13 | 3.90 | N.A. | 0.41 | 1.57 | 2.23 | <0.01 |
Rate of total diabetes (2001–2005 data) | 5.56 | 6.65 | 5.46 | 0.17 | 1.97 | 2.11 | 0.40 |
Rate of total diabetes (2006 data only) | 6.93 | 7.20 | N.A. | 0.35 | 2.24 | 3.67 | <0.01 |
Rate of gestational diabetes (2006 data only) | N.A. | N.A. | N.A. | Â | 1.62 | 2.57 | 0.01 |
Rate of chronic diabetes (2006 data only) | N.A. | N.A. | N.A. | Â | 0.62 | 1.10 | 0.04 |
Maternal ageb (%) | Â | Â | Â | <0.01 | Â | Â | <0.01 |
  <20 | 6.62 | 5.77 | N.A. |  | 6.62 | 5.76 |  |
 20–29 | 42.38 | 39.60 | N.A. |  | 42.44 | 39.79 |  |
 30–39 | 46.75 | 47.57 | N.A. |  | 46.77 | 48.41 |  |
 40+ | 4.18 | 6.78 | N.A. |  | 4.16 | 6.04 |  |
 Unknown | 0.07 | 0.29 | N.A. |  | 0.00 | 0.00 |  |
Maternal ageb (years): mean ± standard deviation | 29.79 ± 6.17 | 30.56 ± 6.46 | N.A. | <0.01 | 29.78 ± 6.16 | 30.44 ± 6.34 | <0.01 |
Maternal education (%) | Â | Â | Â | Â | Â | Â | <0.01 |
 College or higher | N.A. | N.A. | N.A. |  | 57.26 | 52.71 |  |
 High school or lower | N.A. | N.A. | N.A. |  | 40.82 | 43.93 |  |
 Unknown | N.A. | N.A. | N.A. |  | 1.92 | 3.36 |  |
Race/ethnicityb (%) | Â | Â | Â | <0.01 | Â | Â | <0.01 |
 Asian | 10.49 | 9.61 | N.A. |  | 13.65 | 14.85 |  |
 Black | 8.47 | 6.68 | N.A. |  | 8.96 | 6.20 |  |
 Hispanic | 33.01 | 42.74 | N.A. |  | 36.97 | 39.42 |  |
 Non-Hispanic White | 39.62 | 30.56 | N.A. |  | 37.62 | 35.72 |  |
 Other | 4.52 | 5.00 | N.A. |  | 1.91 | 1.98 |  |
 Unknown | 3.88 | 5.41 | N.A. |  | 0.89 | 1.84 |  |
Insuranceb (%) | Â | Â | Â | <0.01 | Â | Â | <0.01 |
 Private | 65.95 | 57.81 | N.A. |  | 66.77 | 66.91 |  |
 Public | 29.97 | 35.66 | N.A. |  | 32.69 | 32.25 |  |
 Other | 0.00 | 0.00 | N.A. |  | 0.44 | 0.63 |  |
 Unknown | 4.07 | 6.54 | N.A. |  | 0.11 | 0.20 |  |