Cardiorespiratory events detected by home memory monitoring and one-year neurodevelopmental outcome.
OBJECTIVE
To determine if infants with cardiorespiratory events detected by home memory monitoring during early infancy have decreased neurodevelopmental performance.


METHODS
Infants (n = 256) enrolled in the Collaborative Home Infant Monitoring Evaluation also completed the Bayley Scales of Infant Development II at 92 weeks' postconceptional age. Infants were classified as having 0, 1 to 4, or 5+ cardiorespiratory events. Events were defined as apnea >or=20 seconds or heart rate <60 to 80 bpm or <50 to 60 bpm, for >or=5 to 15 seconds, depending on age.


RESULTS
For term infants, having 0, 1 to 4, and 5+ cardiorespiratory events was associated with unadjusted mean Mental Developmental Index (MDI) values (+/-SD) of 103.6 (10.6), 104.2 (10.7), and 97.7 (10.9), respectively, and mean Psychomotor Developmental Index (PDI) values of 109.5 (16.6), 105.8 (16.5), and 100.2 (17.4). For preterm infants, having 0, 1 to 4, and 5+ cardiorespiratory events was associated with unadjusted mean MDI values of 100.4 (10.3), 96.8 (11.5), and 95.8 (10.6), respectively, and mean PDI values of 91.7 (19.2), 93.8 (15.5), and 94.4 (17.7). The adjusted difference in mean MDI scores with 5+ events compared with 0 events was 5.6 points lower in term infants ( P = .03) and 4.9 points lower in preterm infants ( P = .04).


CONCLUSIONS
Having 5+ conventional events is associated with lower adjusted mean differences in MDI in term and preterm infants.
National Center on Sleep Disorders Research, National Heart, Lung, and Blood Institute, 6705 Rockledge Dr, Ste 6022, Bethesda, MD 20892-7993, USA.
Carl E
CE
Hunt
Michael J
MJ
Corwin
Terry
T
Baird
Larry R
LR
Tinsley
Paula
P
Palmer
Rangasamy
R
Ramanathan
David H
DH
Crowell
Susan
S
Schafer
Richard J
RJ
Martin
David
D
Hufford
Mark
M
Peucker
Debra E
DE
Weese-Mayer
Jean M
JM
Silvestri
Michael R
MR
Neuman
Jean
J
Cantey-Kiser
D001049:Apnea / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology*; D001919:Bradycardia / Q000175:diagnosis / Q000503:physiopathology* / Q000523:psychology*; D002657:Child Development / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008991:Monitoring, Physiologic; D009483:Neuropsychological Tests; D010092:Oximetry; D011597:Psychomotor Performance / Q000502:physiology