Newborn Daily Crying Time Duration

Current methods for estimating infant crying time are potentially subject to error as they rely on parents to contemporaneously log and calculate crying time. Our aim was to present the average daily infant crying times from a digital recording device, not dependent on parent-based measurement.

We conducted a descriptive longitudinal survey of infant crying times. Parents of healthy, term newborns were provided with voice-activated digital recording devices and asked to record infants continuously for randomly selected 24-hour periods during a 4 week time period. We analyzed the daily crying time for infants at different weeks of life.

Of 136 families approached, 28 (20.5%) families were consented with 3 families withdrawing and 5 families submitting incomplete datasets, leaving a total of 20 families with complete datasets. During the first week of life, the mean crying time was about 25 minutes/day, which remained stable for the next few weeks until five weeks of life, when mean crying time increased to almost 40 minutes/day with increasing variance.

In our study sample, infant mean daily crying times based on objective data were much less than estimates in recent studies.

This study suggests daily crying times measured by digital recorders are less than daily crying times based on parent diaries published in the literature. With the development of new 'apps' to record duration times, it may be clinically inappropriate to compare data based on digital recorders with norms from studies that use parent-reported crying times.