After analyzing the results, they found that babies who began eating solids after three months woke up about 0.27 fewer times and slept about 16 minutes longer than those who started at six months.
The authors said there was a more than 50 percent reduction in the number of families reporting serious sleep issues in their babies. They also noted that the improvements continued throughout the first year of infancy.
Patricia Denning, a pediatrics expert at Emory University who was not a part of the study, called the findings “interesting.”
"The quantitative data in this study, while statistically significant, may not be clinically significant," Denning told the Atlanta Journal-Constitution. Sixteen more minutes of sleep has "questionable significance for the infant," she said.
Although the authors do not yet fully understand the link between introducing solids earlier and better sleep among babies, Denning hypothesized two possible factors. She explained that increased calories and the delayed gastric emptying from solid foods could lengthen “the duration of the feeling of satiety allowing for longer sleep time.”
Nevertheless, she advises mothers to consult with their doctors before making any changes in the kids’ diets.
“It's also important to note that the authors are careful to state that if parents introduce solid foods earlier (under the guidance of a physician), a concomitant benefit ‘may’ be small improvement in sleep characteristics,” Denning said.
"They are not recommending a change in guidelines based on this study alone. Thus, it's very important not to over-interpret the results of this study."