Skip to main content

Table 1 Comparison of demographic and clinical characteristics among participants with different levels of eGFR at baseline

From: Association between pulse pressure, systolic blood pressure and the risk of rapid decline of kidney function among general population without hypertension: results from the China health and retirement longitudinal study (CHARLS)

Characteristics Overall eGFR (ml/min/1.73m2) P value
 ≥ 90 60–89  < 60
In Total (n, %) 4534(100.0) 3140(69.2) 1313(39.0) 81(1.8)  
Age (years, mean ± SD) 57.8 ± 8.4 55.9 ± 7.5 61.7 ± 8.6 68.9 ± 8.4  < 0.001
Gender (n, %)      0.530
 Male 2092(46.1) 1439(45.8) 611(46.5) 42(51.9)  
 Female 2442(53.9) 1701(51.2) 702(53.5) 39(48.1)  
Smoke (n, %)      0.019
 Never 2805(62.1) 1966(62.7) 792(60.7) 47(58.8)  
 Past 387(8.6) 240(7.7) 136(10.4) 11(13.8)  
 Current 1326(29.4) 928(29.6) 376(28.8) 22(27.5)  
Drink (n, %)      0.002
 Never 2669(58.9) 1837(58.6) 777(59.2) 55(67.9)  
 Past 349(7.7) 215(6.9) 126(9.6) 8(9.9)  
 Current 1512(33.4) 1084(34.6) 410(31.2) 18(22.2)  
BMI (kg/m2, mean ± SD) 23.3 ± 3.7 23.3 ± 3.7 23.3 ± 3.8 22.5 ± 4.4 0.170
Diabetes (n, %)      0.003
 No 3521(86.3) 2464(86.9) 1006(85.7) 51(72.9)  
 Yes 559(13.7) 372(13.1) 168(14.3) 19(27.1)  
HbA1c (%, mean ± SD) 5.25 ± 0.77 5.25 ± 0.79 5.24 ± 0.72 5.37 ± 0.90 0.311
LDL (mg/dl, mean ± SD) 115.4 ± 33.7 113.5 ± 32.7 120.0 ± 35.8 113.6 ± 34.7  < 0.001
UA (mg/dl, mean ± SD) 4.3 ± 1.2 4.1 ± 1.1 4.8 ± 1.2 5.9 ± 1.6  < 0.001
PP (mmHg, mean ± SD) 48.1 ± 8.8 47.5 ± 8.6 49.3 ± 9.2 51.6 ± 10.2  < 0.001
PP category (n, %)       < 0.001
 Normal: < 60 mmHg 4057(89.5) 2869(91.4) 1124(85.6) 64(79.0)  
 High: ≥ 60 mmHg 477(10.5) 271(8.6) 189(14.4) 17(21.0)  
SBP (mmHg, mean ± SD) 118.6 ± 11.8 118.0 ± 11.6 119.7 ± 12.1 122.3 ± 11.2  < 0.001
SBP category (n, %)       < 0.001
 Low: < 120 mmHg 2398(52.9) 1728(55.0) 644(49.1) 26(32.1)  
 Medium: 120–129 mmHg 1187(26.2) 827(26.3) 327(24.9) 33(40.7)  
 High: 130–139 mmHg 949(20.9) 585(18.6) 342(26.1) 22(27.2)  
DBP (mmHg, mean ± SD) 70.5 ± 8.9 70.5 ± 8.9 70.5 ± 9.1 70.7 ± 8.9 0.950
DBP category (n, %)      0.836
 Low: < 60 mmHg 531(11.7) 364(11.6) 160(12.2) 7(8.6)  
 Medium: 60–74 mmHg 2502(55.2) 1733(55.2) 725(55.2) 44(54.3)  
 High: 75–89 mmHg 1501(33.1) 1043(33.2) 428(32.6) 30(37.0)  
  1. eGFR estimated glomerular filtration, SD standard deviation, IQR interquartile range, BMI body mass index, HbA1c hemoglobin A1c, LDL low-density lipoprotein, UA uric acid, PP pulse pressure, SBP systolic pressure, DBP diastolic pressure