EXHIBIT 12 COLUMBIA/HCA HEALTHCARE CORPORATION COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES FOR THE QUARTERS AND SIX MONTHS ENDED JUNE 30, 1998 AND 1997 (DOLLARS IN MILLIONS) QUARTER SIX MONTHS --------- ------------- 1998 1997 1998 1997 ---- ---- ------ ------ EARNINGS: Income from continuing operations before minority interests and income taxes............................ $309 $688 $ 710 $1,495 Fixed charges, excluding capitalized interest.......... 179 156 367 302 ---- ---- ------ ------ $488 $844 $1,077 $1,797 ==== ==== ====== ====== FIXED CHARGES: Interest charged to expense............................ $145 $123 $ 298 $ 236 Interest portion of rental expense and amortization of deferred loan costs................................... 34 33 69 66 ---- ---- ------ ------ Fixed charges, excluding capitalized interest.......... 179 156 367 302 Capitalized interest................................... 6 4 10 10 ---- ---- ------ ------ $185 $160 $ 377 $ 312 ==== ==== ====== ====== Ratio of earnings to fixed charges..................... 2.64 5.26 2.86 5.75 ==== ==== ====== ====== 38