Table 2 Mean and median 24-h urinary sodium and potassium excretion by gender, urinary validation study, SSM 2017

Mean sodium excretion

(mg/day)

  Overall

2794 (1349)

2550 (1780–3650)

2962 (1426)

2665 (1875–3807)

2702 (1301)

2470 (1720–3520)

  Creatinine range ¥

2847 (1372)

2615 (1840–3714)

3064 (1410)

2847 (2046–3852)

2738 (1343)

2513 (1732–3578)

Age, y

  18–49

2949 (1351)

2790 (1932–3815)

2956 (1202)

2990 (2080–3740)

2945 (1425)

2700 (1820–4000)

  50–94

2633 (1335)

2390 (1695–3325)

2966 (1612)

2530 (1735–3855)

2427 (1089)

2325 (1647–2985)

0.026^a

0.007^b

0.966^a

0.578^b

0.002^a

0.009^b

Education, y

  Never been in school

2882 (1383)

2696 (1837–3685)

3071 (1451)

2994 (2106–3737)

2790 (1345)

2615 (1740–3654)

  9 y

2509 (1273)

2217 (1506–3311)

2544 (1377)

2212 (1423–3579)

2492 (1229)

2222 (1553–3165)

   > 9 y

2884 (1394)

2611 (1768–3966)

3116 (1471)

2683 (1907–3958)

2661 (1304)

2417 (1571–3996)

0.052^c

0.028^d

0.159^c

0.104^d

0.283^c

0.230^d

Geographic area

  Rural

2905 (1538)

2616 (1694–3825)

3054 (1648)

2767 (1688–4092)

2798 (1459)

2587 (1696–3687)

  Urban

2735 (1300)

2508 (1763–3558)

2849 (1267)

2571 (1867–3597)

2681 (1306)

2549 (1702–3520)

0.275^a

0.556^b

0.432^a

0.602^b

0.548^a

0.842^b

BMI

   < 18.5^e

-

-

-

-

-

-

  18.5–24.9

2977 (1566)

2695 (1731–3922)

3036 (1608)

2767 (1780–4015)

2905 (1529)

2632 (1611–3877)

  25.0–29.9

2787 (1355)

2599 (1727–3682)

2949 (1422)

2695 (1831–3830)

2706 (1321)

2477 (1678–3483)

   ≥ 30.0

2742 (1205)

2513 (1980–2573)

2819 (834)

2524 (2205–3360)

2726 (1274)

2513 (1842–3640)

0.310^c

0.206^d

0.415^c

0.367^d

0.337^c

0.214^d

Mean potassium excretion

(mg/day)

  Overall

1898 (1046)

1640 (1170–2410)

1966 (1118)

1775 (1092–2525)

1861 (1004)

1610 (1200–2290)

  Creatinine range¥

1946 (1065)

1669 (1224–2452)

1995 (1050)

1871 (1336–2441)

1922 (1074)

1610 (1189–2479)

Age, y

  18–49

1931 (1052)

1660 (1190–2470)

1902 (1066)

1640 (1080–2380)

1945 (1048)

1700 (1280–2500)

  50–94

1864 (1042)

1610 (1110–2315)

2024 (1168)

1870 (1095–2575)

1766 (948)

1580 (1132–2077)

0.537^a

0.457^b

0.536^a

0.259^b

0.167^a

0.078^b

Education

  Never been in school

1952 (1069)

1750 (1282–2458)

1892 (981)

1847 (1318–2246)

1981 (1111)

1643 (1263–2572)

  9 y

1745 (964)

1517 (1031–2345)

1776 (1153)

1458 (856–2336)

1729 (867)

1544 (1095–2351)

   > 9 y

1801 (935)

1542 (1115–2257)

1993 (1041)

1919 (1295–2739)

1617 (796)

1391 (1046–1976)

0.201^c

0.201^d

0.715^c

0.450^d

0.094^c

0.174^d

Geographic area

  Rural

2072 (1157)

1788 (1366–2498)

1982 (1112)

1841 (1341–2292)

2136 (1192)

1788 (1368–2696)

  Urban

1831 (1013)

1598 (1103–2367)

1842 (1024)

1659 (1056–2341)

1825 (1011)

1533 (1115–2381)

0.044^a

0.063^b

0.469^a

0.559^b

0.044^a

0.057^b

BMI

   < 18.5^e

-

-

-

-

-

-

  18.5–24.9

1933 (1141)

1633 (1067–2269)

1849 (1052)

1649 (1055–2220)

2032 (1242)

1595 (1122–2750)

  25.0–29.9

1883 (1094)

1634 (1176–2525)

1942 (1092)

1696 (1214–2597)

1854 (1099)

1477 (1157–2479)

   ≥ 30.0

1973 (970)

1729 (1318–2498)

2083 (1039)

1906 (1370–2645)

1950 (959)

1696 (1280–2421)

0.387^c

0.277^d

0.465^c

0.509^d

0.470^c

0.342^d