. 2019 Jun 3;19:72. doi: 10.1186/s12905-019-0770-x

Table 3.

Study Sample Characteristics in Two Groups, with Differences in Medians Expressed as Nonparametric t-test p-values

Parameter	Group	N	Median (IQR)	p-value^c
Age at 1st child	Cases	169	22(20–26)	0.765
Age at 1st child	Control	173	23(20–25)	0.765
Number of Miscarriage Incidences	Cases	122	1(0.75–2.0)	0.004
Number of Miscarriage Incidences	Control	85	1.3(1–2)	0.004
Age at Puberty	Cases	222	13(12–14)	0.000
Age at Puberty	Control	225	14(13–15)	0.000
Age at Menopause	Cases	101	48(40.5–51)	0.000
Age at Menopause	Control	74	50(49–50)	0.000
Duration of Oral Contraceptives Use^a	Cases	211	6.6 (4.2–9.1)^b	0.002
Duration of Oral Contraceptives Use^a	Control	223	4.1 (2.4–5.8) ^b	0.002

^aDuration recorded for the longest continuous use

^bMedian (IQR)

^cMann-Whitney Test