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. 2009 Nov 11;3:31. doi: 10.3389/neuro.07.031.2009

Table 4.

Percentage, valid N, and T-test for birth and delivery-related factors.

Birth-related factors SPD % (N) ASD % (N) t (p)
DELIVERY COMPLICATIONS
General report of delivery complications 42.1 (987) 37.8 (426) 1.528 (0.127)
Prolonged labor 8.0 (982) 10.1 (424) −1.282 (0.200)
Breech position 4.7 (948) 5.7 (406) −0.708 (0.479)
Fetal distress 4.4 (982) 1.9 (424) 2.296 (0.022)
Low fetal heart rate 3.0 (982) 2.6 (424) 0.371 (0.711)
High fetal blood pressure 0.9 (982) 0.9 (424) −0.048 (0.961)
ASSISTED DELIVERY METHODS
Overall assisted delivery 36.1 (988) 43.5 (426) −2.509 (0.012)
C-section 18.1 (983) 21.6 (426) −1.528 (0.127)
Induced labor 5.4 (982) 7.5 (424) −1.553 (0.121)
Forceps 8.3 (973) 7.4 (403) 0.546 (0.585)
Suction 7.6 (934) 10.3 (390) −1.589 (0.112)
GESTATIONAL AGE AND BIRTH WEIGHT
Born prematurely 12.4 (991) 16.0 (455) −1.875 (0.061)
Very low birth weight 1.5 (584) 1.8 (395) −0.279 (0.780)
Low birth weight 4.8 (584) 7.6 (395) −1.822 (0.069)
High birth weight 14.9 (584) 18.0 (395) −1.284 (0.200)