Table 1.
Baseline table of participants categorized by number of cups of coffee consumed.
| Variable | Total | 0 | <2 | 2-4 | >4 | P |
|---|---|---|---|---|---|---|
| N(Unweighted) | 6578(100.00) | 2741(41.66) | 1969(29.93) | 1204(18.30) | 664(10.09) | |
| Age | 51.05(50.28,51.82) | 46.36(45.15,47.57) | 52.84(51.74,53.94) | 56.19(54.96,57.43) | 55.24(53.73,56.75) | 0.01 |
| Sex | 0.01 | |||||
| Male | 3248(49.38) | 1358(49.40) | 876(43.86) | 618(52.73) | 396(59.71) | |
| Female | 3330(50.62) | 1383(50.60) | 1093(56.14) | 586(47.27) | 268(40.29) | |
| Eth | 0.01 | |||||
| white | 3201(48.66) | 1217(42.71) | 736(35.73) | 721(60.01) | 527(80.31) | |
| Black | 1298(19.73) | 779(29.83) | 345(16.44) | 142(10.32) | 32(4.99) | |
| Mexican | 1010(15.35) | 391(14.07) | 417(23.49) | 159(14.79) | 43(5.34) | |
| Other | 1069(16.25) | 354(13.39) | 471(24.34) | 182(14.88) | 62(9.36) | |
| Edu | 0.01 | |||||
| Less than 9th Grade | 723(10.99) | 230(8.62) | 285(15.77) | 151(14.40) | 57(8.63) | |
| 9-11th Grade | 1061(16.13) | 440(15.63) | 347(17.74) | 163(13.87) | 111(16.71) | |
| High School Grad/GED or Equivalent |
1562(23.75) | 671(24.50) | 434(22.85) | 287(24.56) | 170(26.78) | |
| College graduate or above | 3232(49.13) | 1400(51.25) | 903(43.64) | 603(47.17) | 326(47.87) | |
| Smoke | 0.01 | |||||
| Never | 3492(53.09) | 1734(64.81) | 1112(56.56) | 471(40.84) | 175(26.82) | |
| Former | 1745(26.53) | 533(18.60) | 528(25.94) | 456(36.98) | 228(36.72) | |
| Now | 1341(20.39) | 474(16.59) | 329(17.50) | 277(22.18) | 261(36.46) | |
| Alcohol User | 0.01 | |||||
| Never | 931(14.15) | 475(17.72) | 329(18.55) | 91(8.66) | 36(4.77) | |
| Former | 1299(19.75) | 504(17.55) | 375(18.33) | 262(23.84) | 158(23.84) | |
| Mild | 2081(31.64) | 761(27.37) | 628(29.29) | 465(36.93) | 227(37.90) | |
| Moderate | 972(14.78) | 406(14.87) | 275(14.21) | 177(13.29) | 114(15.61) | |
| Heavy | 1295(19.69) | 595(22.48) | 362(19.63) | 209(17.28) | 129(17.88) | |
| DM | 0.01 | |||||
| No | 5686(86.44) | 2433(88.57) | 1669(84.28) | 1020(84.30) | 564(86.14) | |
| Yes | 892(13.56) | 308(11.43) | 300(15.72) | 184(15.70) | 100(13.86) | |
| Hyperlipidemia | 0.01 | |||||
| No | 1617(24.58) | 797(28.38) | 428(20.86) | 255(22.45) | 137(22.32) | |
| Yes | 4961(75.42) | 1944(71.62) | 1541(79.14) | 949(77.55) | 527(77.68) | |
| Hypertension | 0.09 | |||||
| No | 3727(56.66) | 1642(58.61) | 1088(53.22) | 637(54.87) | 360(55.61) | |
| Yes | 2851(43.34) | 1099(41.39) | 881(46.78) | 567(45.13) | 304(44.39) | |
| Hyperthyroidism | 0.33 | |||||
| No | 6562(99.76) | 2734(99.72) | 1965(99.88) | 1202(99.86) | 661(99.42) | |
| Yes | 16(0.24) | 7(0.28) | 4(0.12) | 2(0.14) | 3(0.58) | |
| Hypothyroidism | 0.17 | |||||
| No | 6544(99.48) | 2728(99.68) | 1961(99.71) | 1197(99.78) | 658(99.11) | |
| Yes | 34(0.52) | 13(0.32) | 8(0.29) | 7(0.22) | 6(0.89) | |
| Subclinical Hyperthyroidism |
0.96 | |||||
| No | 6373(96.88) | 2661(96.80) | 1905(96.81) | 1162(96.41) | 645(96.63) | |
| Yes | 205(3.12) | 80(3.20) | 64(3.19) | 42(3.59) | 19(3.37) | |
| Subclinical Hypothyroidism |
0.24 | |||||
| No | 6339(96.37) | 2637(96.19) | 1905(97.27) | 1157(95.31) | 640(96.45) | |
| Yes | 239(3.63) | 104(3.81) | 64(2.73) | 47(4.69) | 24(3.55) | |
| BMI (kg/m 2) | 29.08(28.80,29.35) | 29.36(28.96,29.76) | 28.70(28.35,29.04) | 29.23(28.71,29.76) | 28.74(28.17,29.32) | 0.02 |
| TT3 (ng/dL) | 112.20(110.97,113.44) | 113.90(112.17,115.62) | 111.55(110.08,113.02) | 110.59(108.15,113.03) | 110.22(108.22,112.22) | 0.01 |
| TT4 (ug/dL) | 7.93(7.85,8.00) | 7.93(7.84,8.03) | 7.99(7.89,8.10) | 7.89(7.76,8.02) | 7.78(7.63,7.94) | 0.03 |
| FT3 (pg/mL) | 3.15(3.13,3.17) | 3.18(3.15,3.21) | 3.13(3.10,3.16) | 3.13(3.09,3.17) | 3.10(3.06,3.15) | 0.02 |
| FT4 (ng/dL) | 0.80(0.79,0.81) | 0.80(0.79,0.81) | 0.80(0.79,0.81) | 0.80(0.79,0.82) | 0.80(0.78,0.82) | 0.98 |
| TSH (mIU/L) | 2.01(1.90,2.12) | 1.97(1.86,2.08) | 2.02(1.86,2.17) | 1.95(1.83,2.07) | 2.30(1.79,2.81) | 0.52 |
| Urinary Iodine | 285.45(242.56,328.34) | 302.00(229.73,374.28) | 297.34(205.32,389.35) | 277.98(205.63,350.33) | 191.66(163.06,220.25) | 0.01 |
Edu, education, Eth, ethnicity Categorical variables show percentages, continuous variables show means and confidence intervals. A cup of coffee cup is defined as 283.5 grams.