Table 2. Selecting features based on correlation.

Feature name	Correlation score
T3	0.3827
T4U	0.2203
sick	0.1936
age	0.1924
T3_measured	0.1693
TT4	0.1272
TSH_measured	0.1266
TBG_measured	0.0955
TT4_measured	0.0933
T4U_measured	0.0931
FTI_measured	0.0929
on_thyroxine	0.0853
TSH	0.0565
sex	0.0559
query_hyperthyroid	0.0551
pregnant	0.0455
goitre	0.0385
on_antithyroid_medication	0.0275
query_hypothyroid	0.0258
FTI	0.0252
thyroid_surgery	0.0098
query_on_thyroxine	0.0090
lithium	0.0080
tumor	0.0068