Table 1. Baseline Characteristics of Study Subjects According to Maternal Age Table 1. Baseline Characteristics of Study Subjects According to Maternal Age Table 1. Baseline Characteristics of Study Subjects According to Maternal Age Table 1. Baseline Characteristics of Study Subjects According to Maternal Age
Variables < 30 ≥ 30 P value
Birth Weight (mean (SD)) 3135.92 (404.98) 3200.63 (430.72) <0.001
Macrosomia
No 6880 (98.6) 4939 (97.6) <0.001
Yes 101 ( 1.4) 124 ( 2.4)
FPG level 4.54 (0.59) 4.70 (0.59) <0.001
Hyperglycemia
No 6844 (98.8) 4862 (97.5) <0.001
Yes 85 ( 1.2) 125 ( 2.5)
BMI (mean (SD)) 20.16 (3.93) 21.56 (3.09) <0.001
Nation
Han 6938 (99.4) 5022 (99.2) 0.25
Others 43 ( 0.6) 41 ( 0.8)
Levels of Education
College or higher 5104 (77.4) 3670 (76.9) <0.001
Junior high school or below 243 ( 3.7) 361 ( 7.6)
Senior high school or Secondary 1244 (18.9) 739 (15.5)
History of Passive Smoking
No 4597 (67.4) 3474 (70.9) <0.001
Yes 2220 (32.6) 1423 (29.1)
Work Condition
No 6197 (91.4) 4585 (94.1) <0.001
Yes 586 ( 8.6) 288 ( 5.9)
History of Adverse Pregnancy Outcomes
No 6303 (90.3) 3637 (71.8) <0.001
Yes 678 ( 9.7) 1426 (28.2)
Parity
<3 6648 (95.2) 3337 (65.9) <0.001
≥3 333 ( 4.8) 1726 (34.1)