Table 1.

Inclusion criteria.

P (participants)	Women with a diagnosis of polycystic ovary syndrome
I (intervention)	The intervention group was on a low-carbohydrate diet (carbohydrate accounted for less than 45% of the three major nutrients)
C (comparisons)	The control group was on a regular diet (carbohydrates accounted for more than 45%)
O (outcomes)	The change in body mass index (BMI), homeostatic model assessment of insulin resistance (HOMA-IR), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), follicle-stimulating hormone (FSH), luteotropic hormone (LH), total testosterone (T), and sex hormone-binding globulin (SHBG)
S (study type)	Randomized controlled trials (RCTs) assessing the effects of low-carbohydrate diet on PCOS