Table 2: Agreement and association between the SWS or Bud method compared to the UWS passive drool method for flow rate (g·min-1), osmolality (mOsmol·kg-1), Na (mmol·L-1), K (mmol·L-1), Cl (mmol·L-1), sIgA (mg·L-1), α-amylase activity (U∙mL-1) and cortisol (nmol·L-1). Total participant data was used for analysis. Absolute Bland-Altman data shows the mean difference (d) of either SWS or Bud data from UWS data when pairs of points are compared, as well as the standard error (SE), 1.96 standard deviations (1.96∙s) and 95% limits of agreement (LOA) associated with this difference. Ratio limits of agreement (RLOA) were determined using natural log-transformed data. The correlation coefficient (r) and P-value for the association between SWS or Bud and UWS is shown alongside each set of Bland-Altman values.
|
Bland-Altman Analysis |
|
Linear Regression |
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|
|
|
Absolute LOA |
|
Ratio LOA |
|
|
|
|||||||
|
d (SE) |
1.96∙s |
LOA (95%) |
|
d (SE) |
Mean bias (1+ d) |
1.96∙s (antilog) |
LOA (95%) |
|
r |
P |
||||
|
|
|
lower |
upper |
|
lower |
upper |
|
|||||||
|
Flow Rate (g∙min-1) |
|
|
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|
SWS |
1.6 (0.2) |
2 |
-0.4 |
3.6 |
|
1.5 (0.07) |
2.5 |
2.5 |
0.6 |
2.4 |
|
0.791 |
0.001* |
|
|
Osmolality(mOsmol∙kg-1) |
|
|
||||||||||||
|
SWS |
20.6 (2.3) |
40.2 |
-19.5 |
60.7 |
|
0.3 (0.03) |
1.3 |
1.6 |
-0.2 |
0.8 |
|
0.482 |
0.031* |
|
|
Bud |
17.6 (2.0) |
33.7 |
-16.0 |
51.3 |
|
0.24 (0.02) |
1.2 |
1.5 |
-0.2 |
0.7 |
|
0.688 |
<0.001** |
|
|
Na(mmol∙L-1) |
|
|
||||||||||||
|
SWS |
10.1 (1.1) |
17.8 |
-7.6 |
27.9 |
|
1.0 (0.07) |
2.0 |
3.3 |
-0.2 |
2.2 |
|
0.094 |
0.694 |
|
|
Bud |
7.8 (0.6) |
10.2 |
-2.3 |
17.9 |
|
0.9 (0.02) |
1.9 |
2.9 |
-0.2 |
2.0 |
|
0.115 |
0.631 |
|
|
K (mmol∙L-1) |
|
|
||||||||||||
|
SWS |
0.8 (0.4) |
6.7 |
-5.8 |
7.4 |
|
0.1 (0.02) |
1.1 |
1.3 |
-0.2 |
0.3 |
|
0.777 |
<0.001** |
|
|
Bud |
-1.3 (0.5) |
8.2 |
-9.6 |
6.9 |
|
-0.1 (0.02) |
0.9 |
1.5 |
-0.4 |
0.3 |
|
0.672 |
0.001* |
|
|
Cl (mmol∙L-1) |
|
|
||||||||||||
|
SWS |
-3.5 (1.7) |
29.2 |
-32.7 |
25.8 |
|
-0.03 (0.04) |
1.0 |
2.0 |
-0.7 |
0.7 |
|
0.684 |
<0.001** |
|
|
Bud |
-0.7 (2.0) |
32.7 |
-33.4 |
31.9 |
|
-0.04 (0.05) |
1.0 |
2.1 |
-0.8 |
0.7 |
|
0.719 |
<0.001** |
|
|
sIgA (mg∙L-1) |
|
|
||||||||||||
|
SWS |
-48.2 (7.1) |
117.4 |
-165.7 |
69.3 |
|
-0.9 (0.08) |
0.1 |
3.6 |
-2.2 |
0.4 |
|
0.469 |
0.037* |
|
|
Bud |
-39.5 (7.0) |
116.6 |
-156.1 |
77.0 |
|
-0.7 (0.08) |
0.3 |
3.9 |
-2.1 |
0.7 |
|
0.435 |
0.055# |
|
|
α-amylase activity (U∙mL-1) |
|
|
||||||||||||
|
SWS |
10.3 (1.1) |
19.4 |
-9.1 |
29.7 |
|
0.3 (0.04) |
1.3 |
1.9 |
-0.3 |
1.0 |
|
0.908 |
<0.001** |
|
|
Bud |
1.7 (1.4) |
25.7 |
-24.0 |
27.4 |
|
0.05 (0.05) |
1.1 |
2.3 |
-0.8 |
0.9 |
|
0.851 |
<0.001** |
|
|
Cortisol (nmol∙L-1) |
|
|
||||||||||||
|
SWS |
0.1 (0.1) |
2.2 |
-2.0 |
2.2 |
|
0.01 (0.02) |
1.0 |
1.4 |
-0.3 |
0.4 |
|
0.868 |
<0.001** |
|
|
|
Bud |
-0.3 (0.2) |
2.7 |
-3.1 |
2.5 |
|
-0.1 (0.05) |
0.9 |
2.1 |
-0.9 |
0.6 |
|
0.395 |
0.085# |