Table 2.

Association between OBS with infertility.

Character	Crude model (95%CI)	Model 1 (95%CI)	Model 2 (95%CI)	Model 3 (95%CI)
OBS	0.97 (0.95,0.98)*	0.96 (0.94,0.98)*	0.97 (0.95,0.99)*	0.97 (0.95,0.99)*
OBS quantile
Q1	ref	ref	ref	ref
Q2	0.70 (0.54,0.91)*	0.77 (0.55,1.06)	0.74 (0.53,1.02)	0.76 (0.54,1.07)
Q3	0.70 (0.51,0.96)*	0.71 (0.48,1.05)	0.74 (0.50,1.11)	0.80 (0.53,1.21)
Q4	0.42 (0.30,0.59)*	0.40 (0.27,0.60)*	0.45 (0.29,0.69)*	0.47 (0.31,0.72)*
p for trend	<0.0001	<0.0001	<0.001	0.001
OBS lifestyle	0.82 (0.76,0.89)*	0.82 (0.74,0.91)*	0.85 (0.76,0.95)*	0.85 (0.75,0.96)*
OBS lifestyle quantile
Q1	ref	ref	ref	ref
Q2	0.80 (0.56,1.13)	0.76 (0.50,1.14)	0.79 (0.53,1.17)	0.82 (0.53,1.25)
Q3	0.61 (0.43,0.86)*	0.58 (0.38,0.90)*	0.65 (0.42,1.00)*	0.64 (0.41,1.01)
Q4	0.36 (0.21,0.60)*	0.38 (0.21,0.71)*	0.44 (0.23,0.85)*	0.45 (0.23,0.88)*
p for trend	<0.0001	<0.001	0.01	0.01
OBS dietary	0.97 (0.96,0.99)*	0.97 (0.95,0.99)*	0.97 (0.95,0.99)*	0.98 (0.96,0.99)*
OBS dietary quantile
Q1	ref	ref	ref	ref
Q2	0.63 (0.48,0.81)*	0.67 (0.48,0.93)*	0.68 (0.49,0.95)*	0.68 (0.49,0.95)*
Q3	0.84 (0.64,1.11)	0.86 (0.60,1.21)	0.85 (0.59,1.22)	0.90 (0.62,1.32)
Q4	0.50 (0.35,0.69)*	0.46 (0.31,0.70)*	0.51 (0.33,0.78)*	0.52 (0.35,0.80)*
p for trend	<0.001	0.002	0.01	0.01

Crude model: no covariates were adjusted.

Model 1, age, marital status, race, education level, PIR and ever pregnant were adjusted.

Model 2, Model 1+DM and hypertension were adjusted.

Model 3, Model 2+MetS, eGFR, alumin, HDL and HbA1c were adjusted.

*mean p <0.05.