Table 2 Characteristics and perinatal outcomes of syndactyly cases in Chinese newborns

Gestational age(weeks) ^b

  < 37

1880 (13.8%)

1196 (10.6%)

684 (29.2%)

 37-

11,631 (85.5%)

9989 (88.6%)

1642 (70.1%)

  ≥ 42

100 (0.7%)

83 (0.7%)

17 (0.7%)

Birth weight(g) ^b

  < 1500

300 (2.2%)

129 (1.1%)

171 (7.3%)

 1500-

1522 (11.2%)

978 (8.7%)

544 (23.2%)

 2500-

10,948 (80.4%)

9435 (83.7%)

1513 (64.6%)

  ≥ 4000

841 (6.2%)

726 (6.4%)

115 (4.9%)

Perinatal outcome^{a, b}

 Stillbirths

403 (3.0%)

117 (1.0%)

286 (12.2%)

 Neonate death within 7 days

143 (1.1%)

40 (0.4%)

103 (4.4%)

 Live within perinatal period

13,061 (96.0%)

11,110 (98.6%)

1951 (83.3%)

Nationality^b

 Han

12,620 (92.7%)

10,483 (93.0%)

2137 (91.2%)

 Minorities

991 (7.3%)

785 (7.0%)

206 (8.8%)

Singleton^b

 Yes

13,036 (95.8%)

10,822 (96.0%)

2214 (94.5%)

 No

575 (4.2%)

446 (4.0%)

129 (5.5%)

Parity^b

 1

8843 (65.0%)

7337 (65.1%)

1506 (64.3%)

  ≥ 2

4768 (35.0%)

3931 (34.9%)

837 (35.7%)

Family history^b

 Yes

377 (2.8%)

319 (2.8%)

58 (2.5%)

 No

13,234 (97.2%)

10,949 (97.2%)

2285 (97.5%)