Coronavirus disease vaccine linked menstrual changes: mobile application study

초록

After vaccination, IMB prevalence increased to 3.35% (odds ratio [OR], 1.61; 95% confdence interval [CI], 1.46-1.76; P<0.0001) and IMB duration increased by 0.43 days (95% CI, 0.25-0.60; P<0.0001). The proportion of respondents whose amount of IMB was heavier than regular menstruation increased (OR, 2.96; 95% CI, 1.47-5.93; P=0.002). Menstrual duration decreased by -0.01 days (95% CI, -0.023 to 0.003; P=0.114), and menstrual cycle length increased by 1.39 days (95% CI, 1.30-1.48; P<0.0001). The proportion of participants who answered that there was a difference in menstruation amount increased (OR, 1.52; 95% CI, 1.41-1.64; P<0.0001). The prevalence of IMB increased regardless of the vaccine type.