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Table 1 Baseline characteristics of 13,419 participants from the NAHENS 2003–2008 and 2013–2020

From: Possible impact of antioxidant intake on composite dietary antioxidant index and the progression of benign prostatic hyperplasia: an observational study

variable

total

Q1

Q2

Q3

Q4

P value

ÌýÌý

n = 3357

n = 3353

n = 3354

n = 3355

Ìý

age

49.06(0.29)

48.73(0.53)

50.28(0.40)

49.45(0.55)

47.89(0.44)

&±ô³Ù; 0.0001

poverty

3.20(0.04)

2.75(0.06)

3.13(0.05)

3.36(0.04)

3.42(0.06)

&±ô³Ù; 0.0001

BMI

29.15(0.11)

29.24(0.14)

29.44(0.18)

29.23(0.18)

28.77(0.16)

0.01

ethnicity

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.0001

Mexican American

1870( 8.39)

466(8.74)

472(8.26)

481(8.52)

451(8.12)

Ìý

Non-Hispanic White

5849(67.47)

1259(61.79)

1501(66.83)

1555(70.04)

1534(69.82)

Ìý

Non-Hispanic Black

2993(10.46)

993(15.76)

709(10.84)

675( 8.60)

616( 7.94)

Ìý

Other Hispanic

1117( 5.46)

312(5.84)

281(5.29)

258(5.18)

266(5.59)

Ìý

Other Race - Including Multi-Racial

1590( 8.22)

327(7.87)

390(8.77)

385(7.66)

488(8.54)

Ìý

edu

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.0001

less than high school

2962(13.66)

1087(21.73)

752(13.59)

630(12.68)

493( 9.02)

Ìý

high school

3283(25.28)

898(30.95)

850(27.85)

770(23.13)

765(21.55)

Ìý

more than high school

6991(60.38)

1312(47.32)

1704(58.57)

1912(64.19)

2063(69.43)

Ìý

alcohol user

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.0001

never

1087( 7.25)

324(9.28)

274(7.10)

254(8.94)

235(6.36)

Ìý

former

1782(10.86)

544(14.48)

452(11.80)

441(12.05)

345( 9.37)

Ìý

mild

5278(41.99)

1127(37.66)

1324(46.43)

1428(45.89)

1399(49.55)

Ìý

heavy

3947(32.46)

1012(38.58)

956(34.66)

920(33.12)

1059(34.72)

Ìý

CVD

ÌýÌýÌýÌýÌý

0.003

no

11,378(88.46)

2740(86.69)

2812(87.34)

2845(88.65)

2981(90.57)

Ìý

yes

2041(11.54)

617(13.31)

541(12.66)

509(11.35)

374( 9.43)

Ìý

smoke

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.0001

never

6212(48.63)

1373(43.58)

1527(46.36)

1599(50.42)

1713(52.69)

Ìý

former

4358(31.70)

1072(29.75)

1156(32.91)

1061(30.99)

1069(32.83)

Ìý

current

2840(19.64)

909(26.67)

666(20.74)

693(18.59)

572(14.48)

Ìý

hypertension

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.001

no

7344(59.16)

1736(57.62)

1776(56.32)

1836(58.35)

1996(63.52)

Ìý

yes

6075(40.84)

1621(42.38)

1577(43.68)

1518(41.65)

1359(36.48)

Ìý

DM

ÌýÌýÌýÌýÌý

&±ô³Ù; 0.0001

no

10,550(84.04)

2542(83.22)

2581(81.20)

2643(83.94)

2784(87.21)

Ìý

yes

2869(15.96)

815(16.78)

772(18.80)

711(16.06)

571(12.79)

Ìý

BPH

ÌýÌýÌýÌýÌý

0.04

no

12,334(93.27)

3105(94.87)

3053(92.54)

3076(93.45)

3100(92.51)

Ìý

yes

1085( 6.73)

252(5.13)

300(7.46)

278(6.55)

255(7.49)

Ìý
  1. BMI: body mass index; BPH: benign prostatic hyperplasia; CVD: cardiovascular disease; DM: diabetes mellitus
  2. The values are means and standard deviation (SD); number and proportion
  3. The P values were calculated from the chi-square test to test the difference among CDAI Q1-Q4