Use of cancer-screening services and flu vaccination according to substance-use characteristics between 2007 and 2009 in Boston, Massachusetts
↵* Unhealthy alcohol or any drug use.
↵† Significantly different from persons without unhealthy substance use, χ2 p≤0.01.
↵‡ Significantly different from persons without unhealthy substance use, χ2 p<0.0001.
↵§ Significantly different from persons without unhealthy substance use, χ2 p<0.05.