Table 2 Statistics of MIMIC-III and heart failure datasets

# of patients

7,499

4,925

# of visits

19,911

341,865

Avg. visits per patient

2.66

69.41

# of unique ICD9 codes

4,880

6,747

Avg. # of diagnosis codes per visit

13.06

3.92

Max # of diagnosis codes per visit

39

54

# of words in code descriptions

2,800

3,397

# of category codes

171

149

Avg. # of category codes per visit

10.16

3.33

Max # of category codes per visit

30

33