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Table 5 Multiple linear regression analysis of the relationship between HOMA-β, HOMA-IR and urine arsenobetaine

From: Association of arsenobetaine with beta-cell function assessed by homeostasis model assessment (HOMA) in nondiabetic Koreans: data from the fourth Korea National Health and Nutrition Examination Survey (KNHANES) 2008-2009

Variables Total Male Female
HOMA-β (%) HOMA-IR HOMA-β (%) HOMA-IR HOMA-β (%) HOMA-IR
Coefficient (95% C.I) p value Coefficient (95% C.I) p value Coefficient (95% C.I) p value Coefficient (95% C.I) p value Coefficient (95% C.I) p-value Coefficient (95% C.I) p value
Urine arsenobetaine (μg/g_cr)
 1st quartile (Undetectable-16.36) Reference   Reference   Reference   Reference   Reference   Reference  
 2nd quartile (16.91–70.70) −9.613 (−24.490, 5.264) 0.205 −0.208(−0.449, 0.033) 0.091 −30.043(−53.954, −6.133) <0.05 −0.405(−0.835, −0.025) 0.065 5.394(−13.276, 24.064) 0.571 −0.059(−0.329, 0.211) 0.668
 3rd quartile (71.57–321.71) −17.796(−33.257, −2.334) <0.05 −0.219(−0.469, 0.031) 0.086 −22.382(−44.023, −0.742) <0.05 −0.343(−0.732, 0.046) 0.084 −12.575(−35.104, 9.954) 0.274 −0.071(−0.397, 0.254) 0.667
 4th quartile (324.19–2620.78) −8.368(−24.891, 8.056) 0.318 −0.038(−0.304,0.228) 0.779 −14.950(−39.251, 9.351) 0.228 −0.027(−0.464, 0.410) 0.902 −3.857(−25.647, 17.932) 0.729 −0.055(−0.370, 0.259) 0.731
Age (years) 01.117(−1.486,0.748) <0.001 −0.004(−0.010, 0.002) 0.172 −1.211(−1.752, −0.671) <0.001 −0.006(−0.015, 0.004) 0.258 −1.052(−1.558, −0.546) <0.001 −0.003(−0.011, 0.004) 0.376
BMI (kg/cm2) 5.188 (3.523, 6.853) <0.001 0.136 (0.109, 0.163) <0.001 5.465 (3.075,7.855) <0.001 0.149 (0.106, 0.192) <0.001 5.565 (3.184, 7.946) <0.001 0.132 (0.097, 0.166) <0.001
Smokinga −10.452(−22.42, 1.515) 0.087 −0.114(−0.308, 0.080) 0.248 −11.827(−27.403,3.750) 0.137 −0.251(−0.531, 0.029) 0.079 8.524 (−14.362, 31.410) 0.465 0.242(−0.088, 0.572) 0.151
Alcohol consumptionb −14.864(−26.291, −3.436) <0.05 0.065(−0.120, 0.250) 0.492 −18.557(−37.121, 0.006) 0.050 0.077(−0.256, 0.411) 0.650 −9.699(−24.618, 5.219) 0.203 0.045(−0.170, 0.261) 0.680
Regular exercisec −4.067(−15.791, 7.657) 0.497 −0.137(−0.327, 0.053) 0.157 −2.490(−18.472, 13.492) 0.760 −0.031(−0.318, 0.256) 0.833 −4.731(−21.725, 12.264) 0.585 −0.260(−0.505, −0.015) <0.05
Blood mercury (μg/L)
 1st quartile (1.188–2.977) Reference   Reference   Reference   Reference   Reference   Reference  
 2nd quartile (2.987–4.598) 15.686 (1.036,30.337) <0.05 −0.046(−0.283, 0.191) 0.705 −0.415(−25.210, 24.381) 0.974 −0.264(−0.710, 0.182) 0.246 27.067 (8.938, 45.197) <0.01 0.108(−0.153, 0.370) 0.417
 3rd quartile (4.625–6.969) 5.642(−10.252, 21.536) 0.487 0.023(−0.235, 0.280) 0.862 −2.752(−27.702, 22.197) 0.829 −0.388(−0.836, 0.061) 0.090 11.404(−9.568, 32.377) 0.287 0.304 (0.001, 0.607) <0.05
 4th quartile (6.997–37.654) −15.172(−32.179, 1.835) 0.08 −0.165(−0.440, 0.110) 0.240 −27.387(−52.474, −2.300) <0.05 −0.524(−0.975, −0.073) <0.05 3.667(−21.177, 28.512) 0.772 0.178(−0.181, 0.536) 0.332
  1. Abbreviations: BMI body mass index, C.I confidence interval
  2. aSmoking status was indicated as ‘yes’ for participants who had smoked more than five packs of cigarettes during their life and were currently smoking
  3. bAlcohol consumption was indicated as ‘yes’ for participants who consumed at least one glass of alcohol every month over the previous year
  4. cRegular exercise was indicated as ‘yes’ when the participant performed mederate or strenuous exercise on a regular basis (for more than 30 min at a time and more than five times per week in the case of moderate exercise; for more than 20 min at a time in the case of strenuous exercise)