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Table 1 Baseline characteristics of the study population according to the quartiles of the TyG-BMI index

From: Association between the triglyceride glucose body mass index and asthma: evidence from NHANES 2011–2018

TYG.BMI

Q1, N = 2137

Q2, N = 2139

Q3, N = 2138

Q4, N = 2139

P-value

Age (years)

41.00 (28.00, 59.00)

53.00 (37.00, 66.00)

51.00 (37.00, 65.00)

51.00 (38.00, 63.00)

< 0.001

LDL (mmol/L)

101.00 (81.00, 122.00)

111.00 (88.00, 137.00)

115.00 (91.00, 139.00)

110.00 (90.00, 134.00)

< 0.001

TC (mmol/L)

178.00 (155.00, 204.00)

188.00 (161.00, 215.00)

191.00 (165.00, 219.00)

189.00 (162.00, 216.00)

< 0.001

Gender (%)

    

< 0.001

Male

930 (43.52%)

1156 (54.04%)

1122 (52.48%)

939 (43.90%)

 

Female

1207 (56.48%)

983 (45.96%)

1016 (47.52%)

1200 (56.10%)

 

Race (%)

    

< 0.001

Mexican American

144 (6.74%)

269 (12.58%)

355 (16.60%)

354 (16.55%)

 

Other Hispanic

166 (7.77%)

206 (9.63%)

267 (12.49%)

236 (11.03%)

 

Non-Hispanic White

828 (38.75%)

846 (39.55%)

802 (37.51%)

903 (42.22%)

 

Non-Hispanic Black

414 (19.37%)

444 (20.76%)

426 (19.93%)

498 (23.28%)

 

Other Races

585 (27.37%)

374 (17.48%)

288 (13.47%)

148 (6.92%)

 

Education level (%)

    

< 0.001

Less than 9th grade

135 (6.32%)

189 (8.84%)

213 (9.96%)

201 (9.40%)

 

9-11th grade

245 (11.46%)

257 (12.01%)

287 (13.42%)

288 (13.46%)

 

high school graduate

424 (19.84%)

455 (21.27%)

490 (22.92%)

506 (23.66%)

 

AA degree

608 (28.45%)

629 (29.41%)

665 (31.10%)

751 (35.11%)

 

College graduate or above

725 (33.93%)

609 (28.47%)

483 (22.59%)

393 (18.37%)

 

PIR (%)

    

< 0.001

<=1.3

662 (30.98%)

641 (29.97%)

687 (32.13%)

802 (37.49%)

 

> 1.3, <=3.5

771 (36.08%)

788 (36.84%)

831 (38.87%)

819 (38.29%)

 

> 3.5

704 (32.94%)

710 (33.19%)

620 (29.00%)

518 (24.22%)

 

Coronary heart disease (%)

    

0.001

Yes

62 (2.90%)

98 (4.58%)

80 (3.74%)

111 (5.19%)

 

No

2075 (97.10%)

2041 (95.42%)

2058 (96.26%)

2028 (94.81%)

 

Stroke (%)

    

0.128

Yes

68 (3.18%)

84 (3.93%)

81 (3.79%)

98 (4.58%)

 

No

2069 (96.82%)

2055 (96.07%)

2057 (96.21%)

2041 (95.42%)

 

Hypertension (%)

    

< 0.001

Yes

424 (19.84%)

735 (34.36%)

900 (42.10%)

1120 (52.36%)

 

No

1713 (80.16%)

1404 (65.64%)

1238 (57.90%)

1019 (47.64%)

 

Physical Activity level (%)

    

< 0.001

<=500

827 (38.70%)

937 (43.81%)

1040 (48.64%)

1193 (55.77%)

 

> 500, <=1000

270 (12.63%)

268 (12.53%)

244 (11.41%)

240 (11.22%)

 

> 1000

1040 (48.67%)

934 (43.67%)

854 (39.94%)

706 (33.01%)

 

Diabetes (%)

    

< 0.001

Yes

130 (6.08%)

297 (13.88%)

493 (23.06%)

821 (38.38%)

 

No

2007 (93.92%)

1842 (86.12%)

1645 (76.94%)

1318 (61.62%)

 

Smoking status (%)

    

< 0.001

Yes

821 (38.42%)

931 (43.53%)

975 (45.60%)

987 (46.14%)

 

No

1316 (61.58%)

1208 (56.47%)

1163 (54.40%)

1152 (53.86%)

 

Drinking status (%)

    

0.657

Yes

1866 (87.32%)

1887 (88.22%)

1877 (87.79%)

1893 (88.50%)

 

No

271 (12.68%)

252 (11.78%)

252 (11.78%)

246 (11.50%)

 

Asthma (%)

    

< 0.001

Yes

273 (12.77%)

290 (13.56%)

292 (13.66%)

453 (21.18%)

 

No

1864 (87.23%)

1849 (86.44%)

1846 (86.34%)

1686 (78.82%)

 
  1. The median and interquartile range for continuous variables: P value was calculated by linear regression model. % for categorical variables: P value was calculated by chi-square test
  2. NHANES: National Health and Nutrition Examination Survey; TyG-BMI: Triglyceride glucose body mass index; TC: Total cholesterol; LDL: Iow-density lipoprotein; PIR: Poverty-to-income ratio