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Table 4 The characteristics of 24 h urine among participants consuming different levels of total drinking fluids

From: Drinking patterns and hydration biomarkers among young adults with different levels of habitual total drinking fluids intake in Baoding, Hebei Province, China: a cross-sectional study

 LD1 (n = 39)LD2 (n = 39)LD3 (n = 39)HD (n = 39)Total (n = 156)
MQMQMQMQMQ
24-h Volume (mL)10763701256d5001462b,f6711869c,e7471370668
24-h urine Osmolality (mOsm/kg)730238671337512303430c,e280587309
(≤500 mOsm/kg, n, %)5 (12.8%)*13 (33.3%)18 (46.2%)b22 (56.4%)c58 (37.2%)
Na (mmol/L)20012317195175101148c110175101
K (mmol/L)39.42036.218.230.1b,f19.726.7c,e17.033.7519.42
Cl (mmol/L)202106174101168114148c108169104
Mg (mmol/L)2.900.963.111.392.421.261.89c,e1.112.501.54
Ca (mmol/L)2.4722.211.592.101.251.551.062.091.54
Phosphate (mmol/L)15.916.5417.3612.6613.3410.5611.45c,e9.0514.898.91
Creatinine (mmol/L)10.483.4510.20d6.828.24b6.597.67c4.978.955.17
Uric acid (mmol/L)2.760.922.791.222.07b1.661.96c,e1.142.391.33
Urea (mmol/L)230.30108.13231.50162.87179135154c,e117200.42126.95
USG1.0150.0031.0170.0071.0150.0061.013c,e0.0021.0150.005
pH6.80.56.70.36.70.36.70.36.70.3
  1. Values are shown as the median (M) and quartile ranges (Q); *χ2 = 23.215, P < 0.05;
  2. aThere was statistically significant difference between LD1 and LD2 groups, p < 0.05; bThere was statistically significant difference between LD1 and LD3 groups, p < 0.05; cThere was statistically significant difference between LD1 and HD groups, p < 0.05; dThere was statistically significant difference between LD2 and LD3 groups, p < 0.05; eThere was statistically significant difference between LD2 and HD groups, p < 0.05; fThere was statistically significant difference between LD3 and HD groups, p < 0.05