Methodology: Standard random-digit-dial procedures rely on landlines, but people without landlines are disproportionately likely to be uninsured. Researchers also included a sample of cell phone users. The team interviewed a total of 1,104 New Jersey residents, including:
- Some 804 landline users (using random-digit-dial procedures).
- Some 300 cell phone users who either did not have a landline or rarely answered their landline.
The survey ran from June 1, 2007 to July 9, 2007. The response rate for the landline sample was 34 percent and for the cell sample 36 percent.