Table 1. General characteristics of study participants across categories of whole-day water intake^a.

	Whole-day water intake (n. of glasses/d)
	<2	2–5	6–8	>8	P-valueb
Age, y	37.7±7.5	36.4±8.1	35.2±8.5	35.9±9.1	<0.001
BMI, kg/m2	24.7±4.7	24.5±4.0	25.07±4.7	25.01±4.9	0.17
Female, %	69.9	55	44.4	38.3	<0.001
Obesity, %	41.4	40.7	42.8	41	0.90
Married, %	81.8	82.3	79.2	71.8	<0.001
Current smokers, %	4.8	3.6	2.4	3.3	0.31
Supplement use, %	7.1	7.8	7.3	6.8	0.86
GI medications use, %	24.4	22.8	22.3	26.8	0.35
Antipsychotic medications use, %	5.1	4.9	4.0	6.8	0.33
Regular meal pattern, %					<0.001
Often or always	52.3	59.3	63.6	58.9
Never or occasionally	47.7	40.7	36.4	41.1
Tooth loss, %					<0.001
Have all teeth	27.7	34.9	35.5	33
Lost 1–5 teeth	60	57.7	57.7	60.7
Lost >5 teeth	12.2	7.3	6.8	6.3
Depression, %	32.3	50.7	12.8	4.2	<0.001

^aData are mean ± standard deviation (SD) or percent.

^bObtained from ANOVA or chi-square test, where appropriate.