Regression  
 
 Symptoms of ARI  b  S.E  Z  P-value  95% CI.
           Lowest  Upper
Fixed effect            
b0= intercept -1.408 0.138 -10.21 0.000* -1.678 -1.1376
Random Part            
  0.447 0.101 4.41 0.000* 0.286 0.6969
Intra-correlation coe
cents
           
ICC(r) 0.0572 0.0244 2.344 0.019* 0.024 0.128
(*Significant at 5% level, ICC: Intra class correlation)
Table 4: Results of Multilevel Empty Regression Analysis.