TABLE 2

Increase in Adult Words, Child Vocalizations, and Conversational Turns Over Time

Vocalization Counts32 Weeks (n = 35)36 Weeks (n = 33)Percent Change (95% CI)
Total adult words
 Mean ± SD3306 ± 42748556 ± 6407160
 Median1289825574–287
 Range144–16 549374–26 145
Total conversational turns
 Mean ± SD25 ± 2948 ± 4596
 Median153632–192
 Range0–1053–188
Total child vocalizations
 Mean ± SD113 ± 101195 ± 15676
 Median7715330–138
 Range10–37421–705
  • Analysis for change over time estimated by using negative binomial regression with generalized estimating equations.