Table 5.
Relative risk† of death in users of oral contraceptives compared with never users according to time since last use and duration of use
| Cause of death (ICD-8 code) | Current users or last use <10 years previously
|
Last use ⩾10 years previously
|
|||||
|---|---|---|---|---|---|---|---|
| All users (95% CI) | Duration of use <10 years (No of deaths) | Duration of use ⩾10 years (No of deaths) | All users (95% CI) | Duration of use <10 years (No of deaths) | Duration of use ⩾10 years (No of deaths) | ||
| All causes (000-999) | 1.0 (0.9 to 1.2) | 1.0 (254) | 1.1 (87) | 1.0 (0.9 to 1.1) | 1.0 (331) | 1.1 (54) | |
| All cancers (140-209) | 1.0 (0.8 to 1.2) | 0.8 (104) | 1.3 (56) | 1.0 (0.8 to 1.2) | 1.0 (171) | 1.2 (32) | |
| Colorectal (153-154) | 0.5 (0.2 to 1.2) | 0.5 (6) | 0.5 (2) | 0.6 (0.3 to 1.2) | 0.7 (14) | 0.0 (0) | |
| Lung (162) | 0.9 (0.5 to 1.7) | 0.6 (9) | 1.6 (10) | 1.2 (0.8 to 2.0) | 1.1 (27) | 2.6 (10) | |
| Breast (174) | 1.2 (0.8 to 1.7) | 1.1 (40) | 1.5 (19) | 1.1 (0.8 to 1.5) | 1.1 (51) | 1.1 (7) | |
| Cervix (180) | 2.5 (1.1 to 6.1)* | 1.6 (9) | 5.3 (8) | 1.1 (0.4 to 3.1) | 1.2 (6) | 1.5 (1) | |
| Ovary (183) | 0.2 (0.1 to 0.7)* | 0.2 (2) | 0.3 (1) | 0.7 (0.4 to 1.4) | 0.8 (12) | 0.0 (0) | |
| Other cancers | 0.9 (0.7 to 1.3) | 0.9 (38) | 1.1 (16) | 0.9 (0.7 to 1.3) | 0.9 (61) | 1.3 (14) | |
| All circulatory diseases(390-458) | 1.5 (1.1 to 2.0)** | 1.7 (76) | 1.1 (16) | 1.1 (0.8 to 1.4) | 1.1 (85) | 1.0 (12) | |
| Ischaemic heart disease (410-414) | 1.0 (0.6 to 1.7) | 1.2 (21) | 0.7 (5) | 1.0 (0.7 to 1.5) | 1.0 (42) | 1.1 (7) | |
| Other heart disease (420-429) | 2.8 (0.9 to 8.4) | 3.5 (7) | 1.3 (1) | 0.9 (0.3 to 2.4) | 1.0 (7) | 0.0 (0) | |
| Cerebrovascular disease (430-438) | 1.9 (1.2 to 3.1)* | 2.1 (36) | 1.5 (8) | 1.2 (0.7 to 2.0) | 1.2 (26) | 1.0 (3) | |
| Other circulatory | 1.7 (0.7 to 3.9) | 1.8 (12) | 1.2 (2) | 1.2 (0.5 to 2.7) | 1.1 (10) | 1.5 (2) | |
| All digestive diseases (520-577) | 1.0 (0.5 to 2.2) | 0.9 (9) | 1.5 (4) | 1.1 (0.5 to 2.2) | 1.1 (12) | 0.7 (1) | |
| Liver disease (570-573) | 1.6 (0.6 to 4.4) | 1.0 (4) | 3.6 (4) | 1.7 (0.6 to 4.7) | 1.8 (7) | 1.9 (1) | |
| All other diseases (1-139, 210-389, 460-519, 578-799) | 0.6 (0.4 to 1.0)* | 0.7 (25) | 0.4 (4) | 0.8 (0.6 to 1.2) | 0.8 (41) | 0.8 (6) | |
| Violent and accidental causes (800-999) | 1.3 (0.8 to 2.0) | 1.3 (40) | 1.4 (7) | 1.5 (0.9 to 2.6) | 1.5 (22) | 1.8 (3) | |
| Suicide (950-959) | 1.4 (0.7 to 2.9) | 1.4 (19) | 1.3 (3) | 1.2 (0.5 to 3.1) | 1.1 (6) | 1.9 (1) | |
*
P<0.05,**P<0.01. †Adjusted for age, parity, social class, and smoking. No significant differences in relative risk were found between women who used oral contraceptives for <10 and ⩾10 years.