Table 1: The LOS due to HAI in different hospital levels (days).

LevelnCase groupControl groupIncreased LOStP
SDSD

Provincial or ministerial62723.21.812.31.910.924.89<0.01
Prefectural or municipal93221.31.910.91.910.430.95<0.01
District or county56019.32.19.61.99.721.94<0.01
Total 2119 21.3 1.9 10.9 1.9 10.4 45.13 <0.01