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Table 1 Characteristics of 400 infertile men (number (%) unless stated otherwise)

From: The association between animal flesh foods consumption and semen parameters among infertile Iranian men: a cross-sectional study

Variables Total meat intake
Quartile 1 Quartile 2 Quartile 3 Quartile 4 P-valuea
Range (Serving/day) 0–0.96 0.97–1.32 1.32–2.15 2.16–4.57  
Number of participants 109 91 101 99  
Participants demographic information
 Age (year) 32.44(31.84–33.00) 35.31(34.57–36.05) 35.33(33.93–36.03) 31.80(31.34–32.26) < 0.001
 BMI kg/m2 23.74(23.36–24.12) 28.24(27.82–28.66) 27.47(26.76–28.18) 25.44(24.99–25.89) < 0.001
 Waist to Hip Ratio 0.94(0.91–0.97) 1.13(1.09–1.17) 1.08(1.03–1.13) 0.96(0.93–0.99) < 0.001
 Socioeconomic 4.81(4.62–5) 4.99(4.84–5.14) 4.40(4.22–4.58) 3.85(3.61–3.91) < 0.001
 Education (years) 9.10(8.57–9.63) 10.22(9.88–10.56) 12.21(11.79–12.63) 3.85(3.61–4.09) < 0.001
 Number of participants used pesticide 79(66%) 67(73%) 51(50%) 59(59%) < 0.001
Smoking Never 49 (44%) 55 (60%) 62 (61%) 52 (52%) 0.006
Past smoker 1 (0.09%) 3 (3%) 5 (4%) 9 (9%)
Current smoker 59 (54%) 33 (36%) 34 (33%) 38 (38%)
Physical activity Low 46(42%) 25(27%) 45(44%) 20(20%) < 0.001
Moderate 35(32%) 13(14%) 88(87%) 21(21%)
Extreme 54(49%) 0(0%) 21(20%) 32(32%)
Diet Total energy (kcal/day) 1555(1300–1810) 1960 (1630–2290) 2330 (2020–2650) 2826 (2566–3086) < 0.001
Protein (% of energy) 16.5 (13.1–19.9) 16.3 (12.7–19.9) 16.6(13.1–20.1) 16.1 (13.1–19.1) < 0.001
Fat (% of energy) 24 (20.3–26.7) 31 (24.1–37.9) 33 (30.5–35.5) 38 (35.8–40.2) < 0.001
  1. aFrom the ANOVA test for continuous variables, Chi-square test for categorical variables
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