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Table 1 General characteristics for the three groups

From: The effect of fertility stress on endometrial and subendometrial blood flow among infertile women

Parameter Control (n = 80) Low-scoregroup (n = 150) High-scoregroup (n = 150)
Age (y) 31.5 ± 4.6 29.6 ± 4.1 30.1 ± 4.5
Residence
 Urban 41 (51.2%) 66 (44.0%) 70 (46.6%)
 Rural 39 (48.7%) 84 (56.0%) 80 (53.4%)
 Infertility duration (y) 1.91 ± 0.80 2.05 ± 0.94
Type of infertility
Primary infertility 95 (63.3%) 92 (61.3%)
Secondary infertility 55 (36.6%) 58 (38.6%)
Cause of infertility    
 Female 75 (50.0%) 84 (56%)
 Male 34 (22.6%) 35 (23.3%)
 Mixed 21 (14.0%) 16 (10.6%)
 Unexplained 20 (13.3%) 15 (10.0%)
History of childbearing
 Yes 14 (17.5%) 24 (16.0%) 20 (13.3%)
 No 66 (82.5%) 126 (84.0%) 130 (86.7%)
 Examination date, menstrual cycle (d) 9.60 ± 2.25 9.68 ± 2.22 9.61 ± 2.20