Table 5 Clinical characteristics of participants matched by based on propensity scores and grouped by potassium intake.

From: Association between a High-Potassium Diet and Hearing Thresholds in the Korean Adult Population

  Non-high group
[middle and low tertile groups]
(n = 1755)
High tertile group
(n = 1755)
P-value
Age (years) 57.2 ± 11.8 57.2 ± 10.3 0.951
Sex (men) 636 (63.8%) 636 (36.2%) 1.000
Diabetes mellitus 272 (15.5%) 281 (16.0%) 0.677
Hypertension 661 (37.7%) 682 (38.9%) 0.466
Household income (thousand won/month) 4010 ± 8620 3930 ± 6150 0.751
Smoking    0.795
    Non-smoker 1199 (68.3%) 1181 (67.3%)  
    Ex-smoker 333 (19.0%) 347 (19.8%)  
    Current smoker 223 (12.7%) 227 (12.9%)  
Alcohol intake    0.230
    Abstinence 634 (36.1%) 631 (36.0%)  
    Moderate drinking 1079 (61.5%) 1096 (62.5%)  
    Heavy drinking 41 (2.4%) 28 (1.6%)  
Education level    0.080
    Less than high school 809 (46.1%) 773 (44.0%)  
    High school 538 (30.7%) 600 (34.2%)  
    College or more 408 (23.2%) 382 (21.8%)  
    Physical activity 903 (51.5%) 869 (49.5%) 0.251
    eGFR (mL/min/1.73 m2) 90.2 ± 14.4 89.8 ± 14.0 0.340
    Calorie intake (%) 96.5 ± 32.4 96.3 ± 32.4 0.810
    Protein intake (%) 127.4 ± 67.6 128.7 ± 57.4 0.520
    Fat intake (%) 15.0 ± 7.7 15.2 ± 7.4 0.598
    Carbohydrate intake (%) 70.6 ± 10.9 70.9 ± 10.9 0.390
    Sodium intake (mg/1000 kcal) 2493 ± 1264 2452 ± 1274 0.347
    Occupational noise exposure (%) 219 (12.5%) 223 (12.7%) 0.839
    Explosive noise exposure (%) 400 (22.8%) 404 (23.0%) 0.872
  1. The data are expressed as numbers (percentages) for categorical variables and means ± standard deviations for continuous variables. The P-values were tested using t-tests for continuous variables and Pearson’s χ2 test or Fisher’s exact test for categorical variables.
  2. Abbreviation: eGFR, estimated glomerular filtration rate.