The Voices for Healthy Kids Campaign and US State Legislation to Prevent Childhood Obesity.

We documented childhood obesity legislative activity in all 50 US states that occurred in parallel to the first year of Voices for Healthy Kids (Voices), a campaign to mobilize evidence-based legislation addressing childhood obesity. We identified 217 bills in the year before Voices (November 2012 to October 2013) and 304 bills at follow-up (November 2013 to October 2014). In states with active Voices grantees, the bill enactment rate was 50% higher (increasing from 10% at baseline to 15% at follow-up).