Table 2.

Multivariable-adjusted logistic regression analysis of the association between chewing capacity (FTU), depression (PHQ-9), and constipation

	No. of participants	No. of outcomes of constipation	Model 0	Model 1a	Model 2b
FTU	10,814	1417	0.973(0.957,0.989) ***	0.952(0.933,0.971) **	0.957(0.937,0.977) **
≤ 3	3076	442	ref	ref	ref
3–9	2607	351	0.856(0.715,1.026)	0.780(0.632,0.963) *	0.809(0.651,1.005)
10–12	5131	624	0.742(0.620,0.889) **	0.603(0.481,0.756) ***	0.637(0.504,0.806) ***
PHQ-9 score	10,814	1417	1.066(1.051,1.082) ***	1.051(1.034,1.068) **	1.050(1.032,1.067) **
Non-depression	9930	1219	ref	ref	ref
Depression	884	198	2.324(1.936,2.791) ***	1.971(1.624,2.392) **	1.942(1.602,2.356) **
Joint variable
Q1	4837	559	ref	ref	ref
Q2	294	65	2.313(1.618,3.305) ***	2.051(1.420,2.963) ***	2.056(1.416,2.985) ***
Q3	2350	291	1.074(0.887,1.299)	1.236(1.021,1.496) *	1.220(1.008,1.476) *
Q4	257	60	3.007(2.152,4.200) ***	2.927(2.006,4.269) ***	2.749(1.859,4.065) ***
Q5	2743	369	1.322(1.095,1.597) **	1.705(1.343,2.164) ***	1.614(1.258,2.069) ***
Q6	333	73	2.320(1.680,3.203) ***	2.480(1.710,3.597) ***	2.363(1.600,3.489) ***

^a Model 1 adjusted for age, sex, BMI, education, poverty, smoke, alcohol drink and marital status

^b Model 2 adjusted for age, sex, BMI, education, poverty, smoke, alcohol drink, marital status, diabetes, races, creatinine, total bilirubin, uric acid, and hyperlipidemia

Covariates were selected based on baseline characteristics with P < 0.05 in Table 1

^*P < 0.05, **P < 0.01, ***P < 0.001

Q1: Non-depression + 10 ≤ FTU ≤ 12

Q2: Depression + 10 ≤ FTU ≤ 12

Q3: Non-depression + 3 < FTU ≤ 9

Q4: Depression + 3 < FTU ≤ 9

Q5: Non-depression + FTU ≤ 3

Q6: Depression + FTU ≤ 3