a decreasing trendP < 0.001
Comparing the proportion of hospitals containing > 60 parenteral or per oral antibiotics among 2006, 2012 and 2016 survey, a decreasing trend was observed: 55.7% (24/43) in 2006, 22.5% (6/37) in 2012, and 22.6% (12/53) for per oral antibiotics ( P < 0.001); 50% (21/42) in 2006, 35% (11/37) in 2012, 25.9% (19/53) in 2015 for parenteral antibiotics ( P = 0.187).