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Although non-barrier contraception is commonly prescribed, the risk of urinary tract infections (UTI) with contraceptive exposure is unclear. Using data from Vanderbilt University Medical Centre’s deidentified electronic health record (EHR), women ages 18–52 were randomly sampled and matched based on age and length of EHR. This case-control analysis tested for association between contraception exposure and outcome using UTI-positive (UTI+) as cases and upper respiratory infection+ (URI+) as controls. 24,563 UTI + cases (mean EHR: 64.2 months; mean age: 31.2 years) and 48,649 UTI-/URI + controls (mean EHR: 63.2 months; mean age: 31.9 years) were analysed. In the primary analysis, UTI risk was statistically significantly increased for the oral contraceptive pill (OCP; OR = 1.10 [95%CI = 1.02–1.11],  p  ≤ 0.05), intrauterine device (IUD; OR = 1.13 [95%CI = 1.04–1.23],  p  ≤ 0.05), etonogestrel implant (Nexplanon ® ; OR = 1.56 [95% CI = 1.24–1.96],  p  ≤ 0.05), and medroxyprogesterone acetate injectable (Depo-Provera ® ; OR = 2.16 [95%CI = 1.99–2.33],  p  ≤ 0.05) use compared to women not prescribed contraception. A secondary analysis that included  any  non-IUD contraception, which could serve as a proxy for sexual activity, demonstrated a small attenuation for the association between UTI and IUD (OR = 1.09 [95%CI = 0.98–1.21],  p  = 0.13). This study notes potential for a small increase in UTIs with contraceptive use. Prospective studies are required before this information is applied in clinical settings. Although non-barrier contraception is commonly prescribed, the risk of urinary tract infections (UTI) with contraceptive exposure is poorly understood. This large-cohort, case-control study notes potential for a small increase in UTIs with contraceptive use.

Contraceptive exposure associates with urinary tract infection risk in a cohort of reproductive-age women: a case control study