First, many studies asked women to report their symptoms retrospectively, looking to the past and relying on memory, which is known to inflate reporting of PMS compared to what's called prospective reporting, which involves keeping a daily log of symptoms for at least two months in a row.
Pertama, banyak kajian meminta para wanita melaporkan gejala yang pernah dialami, berdasarkan masa lalu dan mengandalkan ingatan, untuk mendorong pelaporan PMS, ada juga pelaporan prospektif, yang meliputi pencatatan gejala harian selama minimal dua bulan berturut-turut.