Table 2.

Risk Factors in the Study Population, p-values from Chi-square test for Comparison between Cases and Controls

Factor	Cases (n = 224) N (%)	Controls (n = 225) N (%)	p-value1
Age in years (N = 449)
18–35	31 (13.84)	31 (13.78)	0.988
36–45	89 (39.73)	91 (40.44)
46–65	104 (46.43)	103 (45.78)
Breastfeeding (N = 450)
Yes	144 (64)	154 (68.44)	0.522
No	25 (11.11)	19 (8.44)
N/A*	56 (24.89)	52 (23.11)
Duration of breastfeeding in years (N = 449)
≤ 1	50 (22.32)	61 (27.11)	0.610
> 1	94 (41.96)	93 (41.33)
No	24 (10.71)	19 (8.44)
N/A*	56 (25)	52 (23.11)
Pregnancy (N = 450)
Yes	115 (51.11)	173 (76.89)	0.000
No	110 (48.890	52 (23.11)
Miscarriage (N = 450)
Yes	92 (40.89)	84 (37.33)	0.249
No	133 (59.11)	141 (62.67)
Menopausal Status (N = 450)
Premenopausal	101 (44.89)	74 (32.89)	0.006
Postmenopausal	124 (55.11)	151 (67.11)
Regularity of Period (N = 449)
Yes	190 (84.82)	203 (90.22)	0.056
No	34 (15.18)	22 (9.78)
Personal history of cancer (ovarian, rectal, etc.) (N = 449)
Yes	27 (12.05)	0 (0)	0.000
No	197 (87.95)	225 (100)
First or second – degree relative have cancer (N = 449)
Yes	109 (48.66)	34 (15.11)	0.000
No	115 (51.34)	191 (84.89)
Smoking Status (N = 448)
Past Smoker	25 (11.21)	1 (0.44)	0.000
Current Smoker	11 (4.93)	25 (11.11)
Never Smoked	187 (83.86)	199 (88.44)
Hormonal Therapy for Menstrual Irregularities (N = 447)
Yes	24 (10.81)	13 (5.78)	0.060
No	198 (89.19)	212 (94.22)
Postmenopausal Hormonal Therapy (i = 448)
Yes	8 (3.59)	0 (0)	0.004
No	215 (96.41)	225 (100)
Regular Use of Oral Contraceptives (N = 446)
Yes	87 (39.01)	48 (21.52)	0.000
No	136 (60.99)	175 (78.48)
Oral Contraceptives Type (N = 81)
COC*	31 (49.21)	10 (55.56)	0.063
POC*	32 (50.79)	8 (44.44)

^*N/A Not Applicable

^*POC Progestin-Only Contraceptives

^*COCs Combined Oral Contraceptives

¹Chi-square test