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Table 1 Demographic characteristics of the eczema and EAH study population

From: Prevalence of adult eczema, hay fever, and asthma, and associated risk factors: a population-based study in the northern Grassland of China

Variables Eczema EAH Total
No (n = 1766) Yes (n = 330) P No (n = 1989) Yes (n = 107) P
Age (years), mean ± SD 47.94 ± 14.85 43.32 ± 14.02 0.001 48.22 ± 13.89 44.99 ± 13.65 < 0.001 47.71 ± 13.90
Gender, n (%)    0.698    0.312  
 Male 713 (83.9) 137 (16.1)   812 (95.5) 38 (4.5)   850 (40.6)
 Female 1053 (84.5) 193 (15.5)   1177 (94.5) 69 (5.5)   1246 (59.4)
Ethnicity, n (%)    0.811    0.645  
 Han 1050 (84.3) 195 (15.7)   1182 (94.9) 63 (5.1)   1245 (59.4)
 Mongolian 649 (84.4) 120 (15.6)   731 (95.1) 38 (4.9)   769 (36.7)
 Other 67 (81.7) 15 (18.3)   76 (92.7) 6 (7.3)   82 (3.9)
Residence, n (%)    < 0.001    < 0.001  
 Rural 857 (80.6) 206 (19.4)   988 (92.9) 75 (7.1)   1063 (50.8)
 Urban 907 (88.0) 124 (12.0)   999 (96.9) 32 (3.1)   1031 (49.2)
Education level, n (%)a    < 0.001    < 0.001  
 Low 457 (90.5) 48 (9.5)   496 (98.2) 9 (1.8)   505 (24.1)
 Medium 796 (86.3) 126 (13.7)   893 (96.9) 29 (3.1)   922 (44.1)
 High 511 (76.7) 155 (23.3)   598 (89.8) 68 (10.2)   666 (31.8)
Marital status, n (%)b    0.411    0.307  
 Unmarried 120 (80.5) 29 (19.5)   138 (92.6) 11 (7.4)   149 (7.2)
 Married 1601 (84.6) 291 (15.4)   1801 (95.2) 91 (4.8)   1892 (90.9)
 Divorced/widowed 35 (85.4) 6 (14.6)   38 (92.7) 3 (7.3)   41 (2.0)
Annual family income (CNY, mean ± SD)c 5.1 ± 4.0 5.7 ± 5.3 0.007 5.1 ± 4.1 6.5 ± 4.6 0.001 5.2 ± 4.2
BMId, n (%)    0.608    0.409  
 Lean or healthy 873 (83.7) 170 (16.3)   983 (94.2) 60 (5.8)   1043 (49.8)
 Overweight 696 (86.3) 129 (15.6)   788 (95.5) 37 (4.5)   825 (39.4)
 Obese 196 (86.3) 31 (13.7)   217 (95.6) 10 (4.4)   227 (10.8)
Family history, n (%)    < 0.001    < 0.001  
 Positive 579 (32.8) 147 (44.5)   663 (33.3) 63 (58.9)   726 (35.7)
 Negative 1187 (67.2) 183 (55.4)   1326 (66.7) 44 (41.1)   1310 (64.3)
  1. aEducation was categorized as low (received only primary education or no education), medium (finished secondary school or high school) and high (graduated from college or university). Education status was missing in 3 cases in this study
  2. bMarital status was missing in 14 cases
  3. cFamily income was calculated as 10,000 RMB/year/ family
  4. dBMI was categorized according to the World Health Organization criteria, with BMI < 25 kg/m2 defined as lean or healthy, BMI between 25 and 29 kg/m2 defined as overweight, and BMI ≥ 30 kg/m2 defined as obese. BMI status was missing in 1 case