There was no statistically significant difference in the incidence of HR100 bpm at 2 minutes after birth between the T-piece and self-inflating bag groups : 94 % ( 479 of 511 ) and 90 % ( 466 of 516 ) , respectively ( OR , 0.65 ; 95 % CI , 0.41-1 .05 ; P = .08 ) .