Age and ethnicity of patients and details of devices used
| Parameter | Quantity |
|---|---|
| Patients (n) | 272 |
| IUD episodes (n) | 423 |
| Mean age of patients at insertion of each device [years (95% CI)] | 34.4 (33.6–35.1) |
| Ethnicity [n (%)] | |
| White British, White Other | 253 (93.0) |
| Mixed | 1 (0.4) |
| Asian, British Asian | 12 (4.4) |
| Black, Black British | 6 (2.2) |
| Details of devices [n (%)] | |
| Copper IUD | 291 (68.8) |
| IUS (Mirena®) | 125 (29.6) |
| Plastic IUD | 7 (1.6) |
| Median duration of IUD use [years (IQR)] | 4.19 (2.95–5.43) |
CI, confidence interval: IQR, interquartile range; IUD, intrauterine device; IUS, intrauterine system.