Table 2.

Passing and Bablok regression equation and relative confidence interval (“a” means 95% CI for intercept a; “b” means 95% CI for slope b).

Timing comparison	Regression equation	Correlation coefficient (ρ)	95% CI (ρ)
60 min vs 5 min	—	0.38	0.23 to 0.51
60 min vs 10 min	y = −3.08 + 0.11x (a: −3.92 to −2.27; b: 0.09 to 0.12)	0.82	0.76 to 0.87
60 min vs 15 min	y = −7.88 + 0.28x (a: −9.46 to −6.25; b: 0.25 to 0.31)	0.92	0.89 to 0.94
60 min vs 20 min	y = −11.44 + 0.44x (a: −13.72 to −9.00; b: 0.40 to 0.48)	0.96	0.94 to 0.97
60 min vs 25 min	y = −13.63 + 0.58x (a: −16.05 to −11.19; b: 0.54 to 0.62)	0.97	0.96 to 0.98
60 min vs 30 min	y = −14.20 + 0.70x (a: −16.74 to −11.92; b: 0.66 to 0.74)	0.98	0.97 to 0.99
60 min vs 35 min	y = −12.75 + 0.78x (a: −14.96 to −10.63; b: 0.75 to 0.82)	0.99	0.99 to 0.99
60 min vs 40 min	y = −11.58 + 0.86x (a: −13.15 to −9.71; b: 0.83 to 0.90)	0.99	0.98 to 0.99
60 min vs 45 min	y = −9.46 + 0.92x (a: −10.76 to −7.95; b: 0.89 to 0.94)	0.99	0.99 to 1.00
60 min vs 50 min	y = −6.68 + 0.96x (a: −7.93 to −5.65; b: 0.94 to 0.98)	0.99	0.99 to 1.00
60 min vs 55 min	y = −4.00 + 1.00x (a: −4.00 to −2.87; b: 0.98 to 1.00)	1.00	1.00 to 1.00

Spearman correlation coefficient calculated between 60 min respect to each time point. For time at 5 minutes, the Passing and Bablok regression procedure was not reported as the linear model validity was not established by the software.