Table 1. Old versus new call structures.

A	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Day	Day consult resident	Day consult resident	Day consult resident	Day consult resident	Day consult resident	Other resident 2	Other resident 2
Night	Night resident 1	Night resident 1	Night resident 2	Night resident 2	Other resident 1	Other resident 1	Night resident 1
B	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Day	Day consult resident	Day consult resident	Day consult resident	Day consult resident	Day consult resident	Other resident 2	Other resident 2
Night	Night float resident	Night float resident	Night float resident	Night float resident	Other resident 1	Other resident 1	Night float resident

A . Structure of the traditional call system, where two residents were responsible for night coverage while also maintaining daytime clinical responsibilities. B . Structure of the new night float system, where one resident is responsible for night coverage with no daytime clinical responsibilities.