Table 2 Univariate analysis of blood parameters related to oxidative, metabolic, and inflammatory stress on Day 21 (D21).

Variable (unit)	Estimate ± Std. Error	P-value	P-value*	R²**	Note
Oxidative parameters
GSSG (GSSG/GSH + GSSG)	0.005 ± 0.0015	0.001	0.005	0.08	1
GPx (µmol/(min·mL plasma))	− 0.828 ± 0.2354	0.004	0.005	0.08	2
MDA (nmol/g plasma)	0.008 ± 0.0063	0.352	0.9250	0.06	3
ORAC (µM Trolox eq.)	− 0.0007 ± 0.00192	0.850	1.0000	0.06	4
SOD (U/mL plasma)	− 0.0001 ± 0.00047	0.666	1.0000	0.06	4
Metabolic parameters
AG ratio (A:G)	− 0.152 ± 0.0413	0.007	0.008	0.13	5
Albumin (%)	− 0.004 ± 0.0012	0.007	0.008	0.13	6
α-globulin (%)	0.017 ± 0.0036	0.0004	0.0008	0.16	4
β-globulin (%)	0.012 ± 0.0046	0.009	0.012	0.10	7
γ-globulin (%)	0.001 ± 0.0011	0.366	1.00	0.08	6
Total protein (g/L)	0.0008 ± 0.00037	0.524	1.00	0.07	3
Urea (mmol/L)	0.013 ± 0.0102	0.609	1.00	0.06	3
AST (IU/L)	1.86 e-05 ± 3.168 e-04	0.520	1.00	0.06	4
Inflammatory parameters
SAA (μg/mL)	2.80 e-04 ± 8.976 e-05	0.004	0.02	0.11	4
Hp (mg/mL)	0.040 ± 0.0131	0.032	0.04	0.11	8

The results shown are from the univariable model associated with the outcome variable Δ-TL (telomere length before parturition – telomere length after parturition). Disease and parity were forced into the model, while season and BCS were offered and retained when P < 0.1 (see Note). (N = 61).
*P-value after multiple testing, using the Bonferroni correction (p.adjust () function).
**The multiple R-squared.
1. Model covariate is BCS (P < 0.05).
2. Model covariate is season (P < 0.05).
3. Model covariates are BCS and season (P < 0.05 and P < 0.01, respectively).
4. Model covariates are BCS and season (P < 0.05).
5. Model covariates are BCS and season (P < 0.005 and P < 0.0005, respectively).
6. Model covariates are BCS and season (P < 0.005).
7. Model covariate is BCS (P < 0.005).
8. Model covariates are BCS and season (P < 0.005 and P < 0.05, respectively).

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