S.Carolina Death Index: code for primary cause of death?

[charlotteCH]

 
I've just found some South Carolina Death Indexes online and one of the columns is labelled "Primary Cause" of death.  Against each person's name, in this column,  is a number- the person I am looking at has  941  in that column.   The death was in 1946 in Greenville, SC.

Can anyone tell me what 941 is code for in the matter of Primary Cause of Death please?   Or where to look it up?   I've prowled the SC Death Index site  and can't see any legend or interpretations given for this.

Any help much appreciated.
Thank you,
charlotte