From: Using surveillance data to inform a SUID reduction strategy in Massachusetts
Year | sample size (n w) | WIC mothers (n w) | Non-WIC mothers (weighted (n w) | Risk ratio (95% CI)* | P-value |
---|---|---|---|---|---|
2007 | 70,782 | 26,462 | 44,320 | 0.75 (0.68-0.82) | .0001 |
2008 | 70,456 | 25,605 | 44,851 | 0.78 (0.71-0.85) | .0001 |
2009 | 67,874 | 26,050 | 41,824 | 0.85 (0.79-0.91 | .0001 |
2010 | 67,140 | 24,831 | 42,309 | 0.85 (0.79-0.93) | .0001 |
Aggregate (2007–2010) | 276,252 | 102,948 | 173,304 | 0.81 (0.77-0.84) | .0001 |