Comparison of heart rate (bpm) measurements from 1 to 10 min after birth in preterm (<37 weeks) versus term births.
| Minutes from birth | Heart rate (bpm) preterm infants | Heart rate (bpm) term infants | Heart rate (bpm) all infants | p* Value |
|---|---|---|---|---|
| 1 | 96 (72–122) | 99 (66–132) | 96 (65–127) | 0.65 |
| 1.5 | 110 (87–144) | 127 (94–158) | 123 (91–153) | 0.03 |
| 2 | 122 (100–144) | 144 (115–171) | 139 (110–166) | 0.02 |
| 3 | 142 (122–160) | 160 (138–180) | 157 (136–176) | <0.001 |
| 4 | 154 (137–170) | 163 (145–181) | 162 (145–178) | <0.001 |
| 5 | 156 (142–171) | 164 (147–180) | 163 (146–178) | <0.001 |
| 6 | 155 (142–168) | 163 (147–179) | 162 (146–175) | <0.001 |
| 7 | 156 (143–167) | 162 (146–178) | 162 (146–174) | 0.02 |
| 8 | 158 (145–169) | 159 (144–173) | 159 (145–172) | 0.06 |
| 9 | 156 (144–167) | 157 (143–172) | 157 (144–170) | 0.08 |
| 10 | 157 (144–167) | 157 (142–171) | 157 (144–170) | 0.88 |
Data are median (interquartile range). bpm, beats per minute.
↵* p= comparison between term and preterm infants