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Time trends in survival and readmission following coronary artery bypass grafting in Scotland, 1981-96: retrospective observational study
BMJ 2002; 324 doi: https://doi.org/10.1136/bmj.324.7331.201 (Published 26 January 2002) Cite this as: BMJ 2002;324:201
Data supplement
Adjusted outcomes following coronary artery bypass grafting operations
Age adjusted cumulative survival in women up to two years after coronary bypass
Table ACoronary artery bypass grafting operations in men and women, 1981-96
Year Men Women Total No of operations Rate per million No of operations Rate per million No of operations Rate per million 1981 289 116 61 23 350 68 1982 300 120 75 28 375 72 1983 430 172 76 28 506 98 1984 580 232 131 49 711 137 1985 761 305 165 61 926 179 1986 989 396 255 95 1244 240 1987 985 395 284 106 1269 245 1988 1118 448 282 105 1400 270 1989 1125 451 293 109 1418 274 1990 1218 488 328 122 1546 298 1991 1393 558 364 136 1757 339 1992 1669 669 501 187 2170 419 1993 1727 692 515 192 2242 433 1994 1638 657 559 208 2150 415 1995 1754 704 559 208 2313 447 1996 1950 782 586 218 2536 490
Table B Adjusted outcomes following coronary artery bypass grafting operations by year and sex.† Values are hazards ratios (95% confidence intervals)
Year All cause mortality Readmission for ischaemic heart disease Coronary angiography Coronary revascularisation Men Women Men Women Men Women Men Women 1981 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1982 0.83 (0.66to 1.05) 0.90 (0.56 to 1.45) 0.90 (0.73 to 1.10) 1.12 (0.72 to 1.75) 1.06 (0.79 to 1.43) 0.87 (0.40 to 1.88) 0.88 (0.59 to 1.32) 0.21 (0.06 to 0.78)* 1983 0.73 (0.59 to 0.91)** 0.73 (0.44 to 1.21) 0.89 (0.74 to 1.08) 1.30 (0.85 to 2.01) 1.14 (0.86 to 1.51) 1.55 (0.78 to 3.09) 0.80 (0.54 to 1.18) 0.97 (0.42 to 2.23) 1984 0.81 (0.65 to 1.00)* 1.04 (0.67 to 1.62) 0.90 (0.75 to 1.08) 1.13 (0.75 to 1.70) 1.22 (0.93 to 1.59) 1.20 (0.60 to 2.42) 0.90 (0.62 to 1.30) 1.02 (0.45 to 2.33) 1985 0.72 (0.58 to 0.88)** 0.87 (0.56 to 1.35) 0.87 (0.73 to 1.04) 1.36 (0.92 to 2.01) 1.22 (0.93 to 1.59) 2.07 (1.08 to 3.96)* 0.93 (0.65 to 1.34) 1.35 (0.62 to 2.95) 1986 0.82 (0.67 to 1.00) 0.67 (0.43 to 1.03) 0.87 (0.73 to 1.03) 1.08 (0.74 to 1.57) 1.50 (1.16 to 1.94)** 2.09 (1.11 to 3.93)* 0.94 (0.65 to 1.34) 0.96 (0.44 to 2.10) 1987 0.75 (0.61 to 0.93)** 0.65 (0.42 to 1.01) 0.89 (0.75 to 1.06) 0.95 (0.65 to 1.40) 1.79 (1.38 to 2.32)**** 1.99 (1.05 to 3.76)* 1.07 (0.74 to 1.54) 0.84 (0.37 to 1.88) 1988 0.68 (0.55 to 0.84)*** 0.92 (0.60 to 1.42) 0.83 (0.70 to 0.99)* 1.10 (0.75 to 1.62) 1.95 (1.51 to 2.53)**** 2.87 (1.52 to 5.42)** 1.01 (0.69 to 1.46) 1.53 (0.71 to 3.33) 1989 0.62 (0.50 to 0.78)**** 0.74 (0.48 to 1.17) 0.69 (0.58 to 0.83)*** 1.03 (0.70 to 1.52) 2.05 (1.57 to 2.67)**** 2.40 (1.25 to 4.59)** 0.92 (0.62 to 1.36) 1.27 (0.57 to 2.83) 1990 0.67 (0.54 to 0.84)*** 0.77 (0.49 to 1.21) 0.76 (0.63 to 0.91)** 0.96 (0.65 to 1.42) 2.00 (1.52 to 2.62)**** 2.93 (1.53 to 5.59)** 0.91 (0.61 to 1.36) 0.77 (0.32 to 1.85) 1991 0.74 (0.59 to 0.93)* 0.71 (0.45 to 1.13) 0.75 (0.62 to 0.89)** 1.05 (0.72 to 1.55) 2.34 (1.79 to 3.07)**** 2.57 (1.33 to 4.97)** 0.97 (0.65 to 1.45) 1.04 (0.45 to 2.44) 1992 0.65 (0.51 to 0.81)*** 0.74 (0.47 to 1.17) 0.75 (0.63 to 0.89)** 0.99 (0.68 to 1.44) 2.57 (1.96 to 3.36)**** 3.64 (1.93 to 6.89)*** 1.02 (0.68 to 1.53) 1.15 (0.50 to 2.63) 1993 0.65 (0.51 to 0.83)*** 0.70 (0.44 to 1.11) 0.66 (0.55 to 0.79)**** 0.99 (0.68 to 1.45) 2.42 (1.83 to 3.19)**** 3.45 (1.81 to 6.59)*** 1.06 (0.70 to 1.60) 1.22 (0.53 to 2.82) 1994 0.62 (0.48 to 0.81)*** 0.78 (0.48 to 1.26) 0.63 (0.52 to 0.76)**** 0.97 (0.66 to 1.43) 2.34 (1.75 to 3.13)**** 3.98 (2.07 to 7.64)**** 1.17 (0.76 to 1.79) 1.43 (0.61 to 3.32) 1995 0.70 (0.53 to 0.92)** 0.98 (0.60 to 1.59) 0.70 (0.58 to 0.85)*** 0.87 (0.58 to 1.30) 3.01 (2.25 to 4.04)**** 4.38 (2.25 to 8.51)**** 1.13 (0.71 to 1.80) 1.64 (0.68 to 3.93) 1996 0.63 (0.46 to 0.85)** 0.92 (0.54 to 1.55) 0.71 (0.58 to 0.88)** 1.11 (0.74 to 1.68) 2.96 (2.14 to 4.09)**** 3.87 (1.91 to 7.83)*** 1.19 (0.71 to 2.00) 1.34 (0.50 to 3.59) *P<0.05, **P<0.01, ***P<0.001, ****P<0.0001.
†Adjusted for age, Carstairs socioeconomic deprivation category, and urgency, using multivariate Cox’s proportional hazards model.
Figure 1
(F1) Age adjusted cumulative survival in women up to two years after coronary bypass grafting in 1981-2 and 1995-6