Table 1. Clinical and biochemical characteristics of the study participants.
| Variables | No preeclampsia (n=45,674) | Preeclampsia (n=3,391) | P-value | |
|---|---|---|---|---|
| Age (yr) | 30.73±3.24 | 30.92±3.29 | 0.001 | |
| Time before delivery (mon) | 17.88±3.39 | 17.96±3.37 | 0.188 | |
| Time after delivery (mon) | 9.98±5.36 | 9.85±5.32 | 0.145 | |
| Smoking status | 0.006 | |||
| Never | 94.3 | 93.0 | ||
| Past | 3.0 | 3.7 | ||
| Current | 2.7 | 3.3 | ||
| Insurance premiumsa) | <0.001 | |||
| Q1 | 6.0 | 7.1 | ||
| Q2 | 11.6 | 13.0 | ||
| Q3 | 31.8 | 31.7 | ||
| Q4 | 38.3 | 38.3 | ||
| Q5 | 12.3 | 9.9 | ||
| Pre-pregnancy weight (kg) | 53.40±6.94 | 54.68±7.97 | <0.001 | |
| Pre-pregnancy height (cm) | 161.43±5.07 | 161.14±5.16 | 0.001 | |
| Pre-pregnancy BMI (kg/m2) | 20.48±2.44 | 21.05±2.85 | <0.001 | |
| Pre-pregnancy WC (cm) | 68.50±6.43 | 69.51±7.16 | <0.001 | |
| Pre-pregnancy systolic BP (mmHg) | 109.50±10.13 | 111.12±11.74 | <0.001 | |
| Pre-pregnancy diastolic BP (mmHg) | 68.85±7.59 | 69.99±7.81 | <0.001 | |
| Pre-pregnancy FBS level (mg/dL) | 87.01±9.51 | 87.78±10.72 | <0.001 | |
| Pre-pregnancy TC level (mg/dL) | 176.09±28.22 | 177.42±29.31 | 0.008 | |
| Pre-pregnancy HDL-C level (mg/dL) | 63.44±13.11 | 62.72±13.20 | 0.002 | |
| Pre-pregnancy TG level (mg/dL) | 73.57±43.11 | 78.93±52.01 | <0.001 | |
| Pre-pregnancy LDL-C level (mg/dL) | 97.80±25.14 | 99.00±26.36 | 0.008 | |
Values are expressed as mean±standard deviation or number (%).
BMI, body mass index; WC, waist circumference; BP, blood pressure; TC, total cholesterol; TG, triglycerides; HDL-C, high-density lipoprotein cholesterol; LDL-C, low-density lipoprotein cholesterol; FBS, fasting blood sugar.
a)Pre-pregnancy insurance premiums as are classified into 5 quintiles of performance, with the highest income level in Q5.