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Table 1 Characteristics of Study Participants NHANES 1999-2002 (N = 1168)

From: Inverse association between insulin resistance and gait speed in nondiabetic older men: results from the U.S. National Health and Nutrition Examination Survey (NHANES) 1999-2002

Characteristics Men (N = 566) Women (N = 602) P value
Continuous variables, Mean (SE)    
   Age (year) 61.8 (0.4) 62.4 (0.3) 0.202
   Body mass index (kg/m2) 27.9 (0.3) 27.7 (0.3) 0.752
   Fasting plasma glucose (mg/dL) 101.0 (0.5) 97.4 (0.5) <0.001
   Serum insulin (μU/mL) 11.72 (0.4) 10.52 (0.2) 0.001
   Insulin resistance (HOMA-IR) 2.96 (0.1) 2.59 (0.1) <0.001
   Peak leg strength (Newton) 439 (6.2) 299 (4.3) <0.001
   Habitual gait speed (m/sec) 1.090 (0.013) 1.083 (0.011) 0.620
Categorical variables, N (weighted %)    
   Race    0.427
Mexican American 104 (3.2) 114 (3.0)  
Other Hispanic 22 (3.5) 28 (5.2)  
Non-Hispanic White 367 (85.9) 372 (83.5)  
Non-Hispanic Black 62 (4.8) 77 (5.8)  
All others 11 (2.6) 11 (2.5)  
   Hypertension 294 (47.1) 387 (58.9) 0.001
   Heart diseases 73 (12.4) 50 (7.5) 0.017
   Chronic lung disease 30 (4.4) 58 (11.4) 0.001
   Arthritis 184 (32.5) 278 (46.7) <0.001
   Smoking status    0.001
Nonsmoker 429 (73.3) 514 (84.2)  
Light smoker 22 (3.3) 14 (2.3)  
Moderate smoker 39 (7.3) 35 (6.5)  
Heavy smoker 76 (16.1) 39 (7.0)  
   Had > 12 alcohol drinks/year 464 (82.3) 314 (60.5) <0.001
  1. Values were expressed as mean (SEs) and number (weighted %)