Table 3 SIgA concentrations and lysozyme activity levels detected in fresh and frozen human milk samples

SIgA (mg / dL)

N

40

40

40

39

40

Mean ± SD

(95% CI)

27.33 ± 10.18

(24.07–30.59)

13.09 ± 4.27

(11.73–14.46)

18.72 ± 6.35

(16.69–20.75)

19.37 ± 6.65

(17.21–21.52)

22.82 ± 8.25

(20.18–25.46)

Minimum–maximum

10.61–46.14

4.51–22.04

7.79–32.98

6.52–37.69

9.40–39.76

Median

24.99

12.86

18.31

17.76

21.96

Percentile (25^th, 75^th)

19.30, 34.90

10.36, 14.47

14.73, 22.39

15.43, 24.50

16.37, 29.60

% Decrease

-

52.1

31.5

29.1

16.5

Lysozyme (nmol / mg protein)

N

39

38

39

40

40

Mean ± SD

(95% CI)

898.64 ± 194.55

(835.58–961.71)

545.74 ± 251.06

(463.22–628.26)

554.54 ± 133.47

(511.27–597.80)

747.77 ± 210.04

(680.60–814.95)

660.55 ± 343.86

(550.58–770.52)

Minimum–maximum

514.0–1248.0

245.0–1145.0

309.0–873.0

413.0–1486.0

199.0–1653.0

Median

928

471

535

718.50

659.50

Percentile (25^th, 75^th)

737, 1037

331, 700.75

471, 607

587.25, 842.50

346.25, 926.50

% Decrease

-

39.3

38.3

16.8

26.6