0.05). After nursing intervention, patients in intervention group had uncertainty decreased significantly greater than patients in control group (26.5?10.6/20.9?10.7,t=-2.12,P=0.038) and social support increased significantly greater than control (4.1?6.1/-0.73?12.3,t'= 2.02,P=0.049). Significant negative correlations were found between perceived social support and uncertainty before intervention(r=-0.37,P