Parents with children under six years old spend more time using social media than those with older children. This is one of the findings of a new survey conducted by Media Audit and featured on eMarketer.
Starting with 67.1% (for parents with kids under six), the study saw a gradual but steady decrease in usage ending at 55.2% for parents with kids over 18. My guess is that the decrease is based on two factors, parental age and lifestyle.
Though there are exceptions to the rule (Elton John), most sources quote the mean age for a first baby at 25 to 27 years old. So the top level of responders in this survey are in their early-thirties and under. That alone, will account for more social media usage.