Table 2.

Mean 24 h urine osmolality (mOsmol/kg) on weekdays for men and women.

Weekday	24 h Urine Osmolality (Mean ± SD in mOsmol/kg)
	All	Men	Women	p-Value *
Monday	642 ± 252	680 ± 238	605 ± 259	<0.001
Tuesday	639 ± 256	687 ± 238	593 ± 265	<0.001
Wednesday	620 ± 255	670 ± 242	568 ± 257	<0.001
Thursday	639 ± 265	685 ± 250	590 ± 270	<0.001
Friday	634 ± 254	669 ± 234	595 ± 267	<0.001
Saturday	637 ± 250	686 ± 239	588 ± 252	<0.001
Sunday	656 ± 241	687 ± 216	624 ± 260	=0.002
All 24 h samples	638 ± 254	681 ± 237	595 ± 261	<0.001

* p-values derived through Mann–Whitney–U test for differences between genders.