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Table 1 General characteristics of the study participants according to quartiles of DPI

From: The relation between dietary phytochemical index and metabolic syndrome and its components in a large sample of Iranian adults: a population-based study

Variables Total n = 2326 Q1
n = 581
Q2
n = 582
Q3
n = 582
Q4
n = 581
P*
DPI (range)   < 16.7 16.7–21.6 21.7–27.7 > 27.7  
BMI(kg/m2) 27.11 ± 4.99 26.88 ± 4.84 26.87 ± 4.96 27.25 ± 5.05 27.43 ± 5.08 0.14
WC(cm) 93.19 ± 13.11 93 ± 13.19 92.5 ± 13.1 93.1 ± 13.3 94.1 ± 12.7 0.20
Age; n (%) 0.04
 20–29 452(19.6) 128(22.1) 112(19.3) 99(17.2) 113(19.6)
 30–39 494(21.4) 139(24) 119(20.5) 118(20.5) 118(20.5)
 40–49 567(24.5) 121(20.9) 149(25.7) 169(29.3) 128(22.2)
 50–59 457(19.8) 106(18.3) 123(21.2) 103(17.9) 125(21.7)
 60–69 342(14.8) 85(14.7) 77(13.3) 87(15.1) 93(16.1)
Sex; n (%) 0.93
 Male 1097(47.3) 270(46.7) 273(47) 281(48.4) 273(47.2)
 Female 1220(52.7) 308(53.3) 308(53) 299(51.6) 305(52.8)
Marital status; n (%) 0.62
 Married 2004(86.6) 510(88.1) 494(85.6) 508(87.6) 492(85)
 Single 227(9.8) 48(8.3) 63(10.9) 54(9.3) 62(10.7)
 Divorced or widowed 84(3.6) 21(3.6 20(3.5) 18(3.1) 25(4.3)
Physical activity; n (%) 0.62
 Sedentary 688(30.9) 170(30.4) 170(30.4 181(32.1 167(30.6)
 Moderate 809(36.3) 211(37.7) 189(33.8) 210(37.3) 199(36.4)
 Active 730(32.8) 178(31.8) 200(35.8) 172(30.6) 180(33)
Education; n (%) 0.62
 Lower than diploma 1234(53.5) 301(52.5) 304(52.7) 324(56.2) 305(52.8)
 High school diploma 700(30.4) 182(31.7) 180(31.2) 164(28.5) 174(30.2)
Smoking; n (%) 0.75
 Never and former 2074(91.6) 531(93) 519(91.7) 512(90.1) 512(91.7)
 Current 189(8.4) 40(7) 47(8.3) 56(9.9) 46(8.2)
Job status; n (%) 0.86
 Not employed 1373(59.7) 347(60) 338(59) 339(58.9) 349(61)
 Employed 926(40.3) 231(40) 235(41) 237(41.1) 223(39)
Chronic diseases family history; n (%) 0.49
 No 504(41.2) 141(44.8) 124(39.4) 124(41.1) 115(39.7)
 Yes 718(58.8) 174(55.2) 191(60.6) 178(58.9) 175(60.3)
 Metabolic syndrome; n (%) 1005(45.2) 227(41) 255(45.5) 253(45.3) 270(49.2) 0.05
 Abdominal obesity; n (%) 1025(44.5) 237(41.1) 257(44.4) 249(43.2) 282(49.2) 0.04
 Elevated blood pressure; n (%) 559(26.8) 126(22.6) 154(27.4) 157(27.9) 162(29.2) 0.06
 Hypertriglyceridemia; n(%) 1423(61.2) 368(63.3) 343(58.9) 349(60) 363(62.5) 0.36
 Low serum HDL-C; n (%) 813(35.1) 209(36.2) 207(35.6) 207(35.7) 190(32.9) 0.63
 High serum FBS; n (%) 718(30.9) 175(30.1) 178(30.6) 185(31.8) 180(31) 0.93
  1. BMI Body mass index, WC Waist circumference, DPI Dietary phytochemical index, HDL-C High-density lipoprotein cholesterol, FBS Fasting blood sugar, Q quartile, SD Standard deviation
  2. Data are shown mean ± SD for BMI, WC and n(%) for categorical variables. P-Value from ANOVA for continious variables and Chi – square test for categorical. P-Values < 0.05 was considered significant