Table 3.

Stratified analysis of uric acid and infertility risk based on age, marital status, BMI, and database year.

Stratified factor	N	Q1	Q2 OR (95% CI)	P	Q3 OR (95% CI)	P	Q4 OR (95% CI)	P
Age (years)
≤ 35	1135	Ref	1.63 (0.86, 3.09)	0.132	2.01 (1.07, 3.78)	0.03	2.47 (1.29, 4.73)	0.006
> 35	1062	Ref	1.04 (0.63, 1.73)	0.873	1.59 (0.95, 2.63)	0.075	1.44 (0.84, 2.47)	0.191
Marital status
Married/Living with Partner	1431	Ref	1.41 (0.88, 2.24)	0.152	2 (1.25, 3.19)	0.004	1.84 (1.12, 3.04)	0.016
Widowed/Divorced/Separated	278	Ref	0.9 (0.3, 2.7)	0.852	1.16 (0.39, 3.48)	0.793	2.07 (0.69, 6.24)	0.196
Never married	488	Ref	0.84 (0.28, 2.5)	0.748	1.24 (0.43, 3.59)	0.685	1.32 (0.45, 3.92)	0.614
BMI
< 18.5	42	Ref	–	–	–	–	–	–
18.5–24.9	616	Ref	1.55 (0.81, 2.96)	0.185	2.27 (1.13, 4.56)	0.021	1.0043 (0.365, 2.7632)	0.993
25–29.9	553	Ref	0.79 (0.33, 1.89)	0.59	1.43 (0.61, 3.35)	0.409	2.51 (1.08, 5.83)	0.033
≥ 30	986	Ref	1.3 (0.66, 2.54)	0.448	1.83 (0.98, 3.4)	0.058	1.85 (1.01, 3.4)	0.048
Database year
2013–2016	1266	Ref	1.54 (0.89, 2.67)	0.123	2.25 (1.3, 3.87)	0.004	2.08 (1.17, 3.69)	0.013
2017-March 2020 pre-pandemic	931	Ref	0.97 (0.54, 1.75)	0.925	1.32 (0.74, 2.35)	0.35	1.74 (0.95, 3.2)	0.072

BMI body mass index. Significant values are in [bold].