| Before June 2009 (N=51/292) | Between July 2009 and December 2009 (N=37/260) | Between January 2010 and June 2010 (N=21/237) |
---|---|---|---|
Group A (Ca & Al) | 10/108 | 5/83 | 6/81 |
Group B (SH) | 21/80 | 17/76 | 6/68 |
Group C (LC) | 0/24 | 0/22 | 1/21 |
Group D (SH & Ca/Al) | 19/60 | 13/59 | 5/50 |
Group E (LC & Ca/Al) | 1/20 | 2/20 | 3/17 |
P Value (B&D cf. A) | <0. 001 | <0. 004 | 0 .67 |