Table 2.
Correlation coefficients, significance levels and regression line equations for the relationships between SICF, SAI and SICFSAI
| A. Correlation between SICF and SICFSAI | ||||
|---|---|---|---|---|
| Pearson correlation | Regression line | |||
| SICF vs. | coefficient (R) | P-value | equation | |
| Not shown | SICFSAI (TS unadjusted) | |||
| SICF1SAI (TS) | 0.84 | 0.001 | y = 1.73x – 1.24 | |
| SICF T1SAI (TS) | 0.28 | 0.384 | y = 0.60x + 1.13 | |
| SICF2SAI (TS) | 0.75 | 0.005 | y = 1.50x – 0.71 | |
| SICF3SAI (TS) | 0.90 | <0.001 | y = 1.98x – 1.80 | |
| AP SICF1SAI (TS) | 0.85 | 0.004 | y = 1.72x – 1.17 | |
| Fig. 8A | SICFSAI (TS adjusted) | |||
| SICF1SAI (TS*) | 0.76 | 0.005 | y = 0.85x + 0.53 | |
| SICF T1SAI (TS*) | 0.51 | 0.088 | y = 0.63x + 0.80 | |
| SICF2SAI (TS*) | 0.78 | 0.003 | y = 0.75x + 0.74 | |
| SICF3SAI (TS*) | 0.86 | <0.001 | y = 0.83x + 0.49 | |
| AP SICF1SAI (TS*) | 0.88 | 0.002 | y = 0.98x + 0.15 | |
| Not shown | SICFSAI (TS and CS adjusted) | |||
| SICF1SAI (TS* CS*) | 0.76 | 0.004 | y = 0.85x + 0.49 | |
| SICF T1SAI (TS* CS*) | 0.45 | 0.147 | y = 0.72x + 0.62 | |
| SICF2SAI (TS* CS*) | 0.75 | 0.005 | y = 0.69x + 0.86 | |
| SICF3SAI (TS* CS*) | 0.87 | <0.001 | y = 1.01x + 0.04 | |
| AP SICF1SAI (TS* CS*) | 0.89 | 0.001 | y = 0.82x + 0.57 | |
| B. Correlation between SAI and SICF or SICFSAI | ||||
|---|---|---|---|---|
| Pearson correlation | Regression line | |||
| SICF vs. | coefficient (R) | P-value | equation | |
| Fig. 8B | SICF | |||
| SICF1 | −0.60 | 0.038 | y = −0.42x + 3.06 | |
| SICF T1 | 0.02 | 0.949 | y = 0.01x + 2.03 | |
| SICF2 | −0.60 | 0.039 | y = −0.43x + 3.09 | |
| SICF3 | −0.72 | 0.009 | y = −0.63x + 3.23 | |
| AP SICF1 | −0.53 | 0.142 | y = −0.40x + 2.98 | |
| Fig. 8B | SICFSAI (TS unadjusted) | |||
| SICF1SAI (TS) | −0.91 | <0.001 | y = −1.32x + 4.88 | |
| SICF T1SAI (TS) | −0.61 | 0.036 | y = −0.64x + 3.24 | |
| SICF2SAI (TS) | −0.91 | <0.001 | y = −1.30x + 4.83 | |
| SICF3SAI (TS) | −0.92 | <0.001 | y = −1.79x + 5.34 | |
| AP SICF1SAI (TS) | −0.85 | 0.004 | y = −1.30x + 4.79 | |
| Fig. 8B | SICFSAI (TS adjusted) | |||
| SICF1SAI (TS*) | −0.92 | <0.001 | y = −0.95x + 4.12 | |
| SICF T1SAI (TS*) | −0.29 | 0.367 | y = −0.23x + 2.45 | |
| SICF2SAI (TS*) | −0.94 | <0.001 | y = −0.85x + 3.96 | |
| SICF3SAI (TS*) | −0.85 | <0.001 | y = −0.96x + 3.95 | |
| AP SICF1SAI (TS*) | −0.53 | 0.145 | y = −0.78x + 3.86 | |
| Not shown | SICFSAI (TS and CS adjusted) | |||
| SICF1SAI (TS* CS*) | −0.97 | <0.001 | y = −0.99x + 4.14 | |
| SICF T1SAI (TS* CS*) | −0.30 | 0.341 | y = −0.31x + 2.57 | |
| SICF2SAI (TS* CS*) | −0.94 | <0.001 | y = −0.83x + 3.89 | |
| SICF3SAI (TS* CS*) | −0.76 | 0.004 | y = −0.63x + 3.23 | |
| AP SICF1SAI (TS* CS*) | −0.52 | 0.153 | y = −0.63x + 3.66 | |
A, strong correlations were observed between SICF and SICFSAI in adjusted and unadjusted conditions. B, SAI and SICF correlated at baseline and this relationship was maintained when SICF was delivered in the presence of SAI. Correlations were strongest at SICF peaks. SICF1, SICF2 and SICF3, SICF peaks 1, 2, 3; T1, trough 1. P < 0.05 indicates a significant correlation without correction for multiple comparisons; P < 0.01 indicates a significant correlation with correction for multiple (5) comparisons in each condition.