Skip to main content

Table 2 Descriptive characteristics of the sample and mean leukocyte telomere length (base pairs) across each level of the categorical covariates of the study

From: Caffeine consumption and telomere length in men and women of the National Health and Nutrition Examination Survey (NHANES)

Variable N Weighted % Adjusted* Telomere mean SE F P
Gender      2.5 0.1267
 Men 2741 47.4 5893 51   
 Women 3085 52.6 5927 49   
Race      4.0 0.0103
 Non-Hispanic White 2902 73.1 5891a,c 62   
 Non-Hispanic Black 1056 10.4 6012b 72   
 Mexican American 1428 7.3 5790a 51   
 Other Race 144 3.1 5891a,b,c 68   
 Other Hispanic 296 6.1 5972b,c 64   
Education      3.3 0.0529
 < High School 2068 22.8 5862 50   
 High School Diploma 1356 26.0 5921 57   
 > High School 2402 51.2 5950 52   
Marital Status      2.0 0.0967
 Married 3323 57.0 5901 46   
 Widowed 492 6.2 5919 63   
 Divorced 484 9.3 5877 58   
 Separated 201 3.1 5785 61   
 Never Married 821 15.4 5935 65   
 Living with Partner 313 5.8 5852 59   
 Other 192 3.3 6108 100   
Housing Status      6.3 0.0054
 Own or Buying 3824 69.8 5848a 39   
 Renting House 1841 28.0 5849a 49   
 Other 161 2.2 6036b 77   
Physical Activity      6.1 0.0024
 Sedentary 3375 49.5 5860a 43   
 Low Activity 812 15.4 5885a 51   
 Moderate Activity 821 17.3 5890a 63   
 High Activity 818 17.8 6010b 63   
Body Mass Index      4.1 0.0094
 Missing 149 2.2 5983a 77   
 Underweight 83 1.7 5946a,b 79   
 Normal Weight 1611 30.3 5924a 46   
 Overweight 2066 33.6 5861a,b 54   
 Obese 1917 32.1 5842b 46   
Alcohol Use      1.2 0.3129
 Abstainer 2312 36.2 5894 44   
 Moderate Drinker 1776 31.9 5899 56   
 Heavy Drinker 1738 31.9 5940 57   
Coffee Intake      4.5 0.0104
 None 2802 48.1 5912a,b 46   
 Low 1175 17.2 5877b 59   
 Moderate 1024 17.4 5901b 48   
 High 825 17.3 5997a 71   
  1. * Telomere means were adjusted for differences in all of the covariates
  2. a,b,c Telomere means across different levels of the same variable with the same superscript letter are not significantly different. Age and smoking (pack-years) were treated as continuous variables and therefore are not part of Table 2. All Ns are unweighted and all proportions are survey-weighted. Focus should be on the survey-weighted proportions because they represent the U.S. adult population