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Table 1 Characteristics of the patients

From: Prevalence and associated factors of erectile dysfunction, psychological disorders, and sexual performance in primary vs. secondary infertility men

Characteristics Total
(n = 387)
Primary infertility
(n = 258)
Secondary infertility
(n = 129)
P
Age (years), mean ± SD 33.9 ± 5.7 31.4 ± 3.8 38.8 ± 5.7 < 0.001
BMI (kg/m2), mean ± SD 24.5 ± 3.2 24.3 ± 3.1 24.9 ± 3.4 0.05
Monthly income (RMB), n (%)     0.001
 0-5000 10 (2.6) 9 (3.5) 1 (0.8)  
 5001-10,000 44 (11.4) 30 (11.6) 14 (10.9)
 10,001–15,000 114 (29.5) 85 (32.9) 29 (22.5)
 15,001–20,000 131 (33.9) 89 (34.5) 42 (32.6)
 > 20,000 88 (22.7) 45 (17.4) 43 (33.3)
Education level, n (%)     0.003
 Junior high school and lower 10 (2.6) 3 (1.2) 7 (5.4)  
 High school 62 (16.0) 32 (12.4) 30 (23.3)
 University 228 (58.9) 160 (62.0) 68 (52.7)
 Above university 87 (22.5) 63 (24.4 %) 24 (18.6)
Marriage duration (years), mean ± SD 4.4 ± 4.1 3.2 ± 2.1 6.8 ± 5.8 < 0.001
Couple’s relationship, n (%)     0.194
 Average 40 (10.3) 23 (8.9) 17 (13.2)  
 Good 347 (89.7) 235 (91.1) 112 (86.8)
ART semen collection, n (%)     0.743
 No 286 (73.9) 192 (74.4) 94 (72.9)  
 Yes 10 1(26.1) 66 (25.6) 35 (27.1)
Cause of infertility, n (%)     < 0.001
 Male factors 181 (46.8) 128 (49.6) 53 (41.1)  
 Female factors 47 (12.1) 33 (12.8) 14 (10.9)  
 Both factors 100 (25.8) 49 (19.0) 51 (39.5)  
 Unknown 59 (15.2) 48 (18.6) 11 (8.5)  
  1. SD standard deviation, BMI body mass index, ART assisted reproduction technology