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Table 1 Demographic characteristics of participants

From: Epigenetic regulation of AXL and risk of childhood asthma symptoms

  Primary study population (N = 246) Replication population (N = 1038) p valuea
Male sex, n (%) 98 (39.8) 541 (52.1) 0.0005
Ethnicity, n (%)    0.05
 Hispanic 147 (59.8) 531 (51.3)  
 Non-Hispanic White 72 (29.3) 381 (36.8)  
 Asian/Black/Other 27 (11.0) 124 (12.0)  
Ever MD-diagnosed asthma, n (%) 39 (15.9) 295 (28.4) < 0.0001
Ever wheezing, n (%) 66 (26.8) 455 (43.8) < 0.0001
Wheezing in the previous 12 months, n (%) 37 (15.0) 250 (24.1) 0.001
Bronchitic symptoms in the previous 12 months, n (%) 40 (16.3) 229 (22.1) 0.04
Parental education, n (%)    0.002
 High school or less 89 (36.6) 316 (31.3)  
 Some college 76 (31.3) 438 (43.5)  
 Finished college/some graduate school 78 (32.1) 254 (25.2)  
Age years, mean (sd) 6.4 (0.6) 7.2 (1.3) < 0.0001
Gestational age days, mean (sd) 277.5 (11.0) 272.7 (11.3) < 0.0001
  1. aDerived from a Pearson’s Chi-squared test for categorical variables and from an unequal variance 2-sample t test for continuous variables