1 Exhibit 12.1 ------------ UNAUDITED BOSTON SCIENTIFIC CORPORATION STATEMENT OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES (In thousands) Year Ended December 31, --------------------------------------------------------------- 1997 1996 1995 1994 1993 --------------------------------------------------------------- Fixed charges: Interest expense $14,285 $11,518 $9,591 $8,378 $3,761 Capitalized interest 4,976 Debt issuance costs 65 501 Interest portion of rental expense 14,354 8,534 5,802 5,370 4,103 --------------------------------------------------------------- Total fixed charges $33,680 $20,553 $15,393 $13,748 $7,864 =============================================================== Earnings: Income before income taxes and cumulative effect of change in accounting $258,668 $303,330 $62,678 $219,703 $120,724 Fixed charges per above 33,680 20,553 15,393 13,748 7,864 LESS: capitalized interest 4,976 --------------------------------------------------------------- Total earnings, as adjusted $287,372 $323,883 $78,071 $233,451 $128,588 =============================================================== Ratio of earnings to fixed charges 8.53 15.76 5.07 16.98 16.35 ===============================================================