Table 4.

Clinical characteristics predictive of CD34⁺ 3.21> ×10⁶ (median) in univariate and multivariate analysis

Characteristics*	Univariate	Multivariate
	Odds Ratio (95% CI), p-value
Infant gestational age (weeks)
Overall Effect	p<0.0001	p<0.0001
34–37 vs. 38–40	1.89 (1.51–3,20), p<0.0001	2.20 (1.74–2.79), p<0.0001
34–37 vs. 41–42	2.44 (1.86–3.20), p<0.0001	3.14 (2.35–4.18), p<0.0001
38–40 vs. 41–42	1.29 (1.08–1.53), p=0.0049	1.42 (1.18–1.71), p=0.0002
Infant Race/Ethnicity*
Overall Effect	p=0.0510	p=0.1172
Caucasian compared to African American	1.29 (1.10–1.51), p=0.0018	1.27 (1.07–1.50), p=0.0057
Hispanic compared to African American	1.21 (0.98–1.49), p=0.0726	1.28 (1.03–1.60), p=0.0259
Infant birth weight (g)
>3500	1.64 (1.46–1.83), p<0.0001	1.53 (1.36–1.73), p<0.0001
≤3500	1.00	1.00
Infant gender
Male	1.36 (1.22–1.51), p<0.0001	1.24 (1.11–1.40), p=0.0002
Female	1.00	1.00
Maternal age (years)
>20	1.27 (1.04–1.56), p=0.0217	NS
≤20	1.00
Collection volume (ml) and delivery type
≤80
Vaginal	NS	NS
Caesarian
>80
Vaginal	NS	1.19 (1.04–1.37), p=0.0130
Caesarian		1.00
Processing time (hours)
Overall Effect	p<0.0001	p=0.0004
<10 hours vs. 10–23 hours	1.16 (1.03–1.30), p=0.0139	1.12 (0.99–1.28), p=0.0687
<10 hours vs. ≥24 hours	1.47 (1.23–1.76), p<0.0001	1.46 (1.21–1.76), p<0.0001
10–23 hours vs. ≥24 hours	1.27 (1.07–1.51), p=0.0068	1.30 (1.08–1.56), p=0.0045
Viability (%)
98–100	NS	NS
90–97

CI; Confidence Interval; NS: not significant;

^*Characteristics that were predictive of higher CD34⁺ content in either univariate or multivariate analysis were included. Viability of the cord blood cells was not associated with CD34⁺ content and was therefore not included in this table. All races/ethnicities were compared against each other in both univariate and multivariate analysis. Only the relationships that are statistically significant are shown in the table.