Table 2.
Frequency and odds of insertion within 8 weeks after delivery in each contraceptive group by age group
| Age in years | ENG implant n (%) |
LNG-IUS n (%) |
OR (95% CI) of ENG implant vs. LNG-IUS |
|---|---|---|---|
| 15–19 | 153 (6.4) | 438 (19.8) | 0.28 (0.23, 0.34) |
| 20–24 | 240 (11.9) | 1803 (20.0) | 0.54 (0.47, 0.62) |
| 25–44 | 415 (13.9) | 9809 (14.3) | 0.98 (0.88, 1.08) |
OR=odds ratio, determined using logistic regression.
95% CI= 95% confidence interval
There is a significant interaction between age and contraceptive insertion (ENG implant vs. LNG-IUS) within 8 weeks after delivery (P<0.001). Younger age is associated with a smaller likelihood of having ENG implant vs. having LNG-IUS inserted within 8 weeks after delivery.
Bolded values indicate significant results (p<0.05).
ENG implant=subdermal etonogestrel implant
LNG-IUS=levonorgestrel intrauterine system