Table 3.

Comparisons of time–intensity curves between the case and control groups

Parameters	Case (n=143)	Control (n=161)	Unpaired t-test	P-value
Peak intensity	7.29±2.18	3.65±1.10	18.68	<0.001
The area under the curve	295.76±56.97	285.27±73.58	1.38	0.169
Start time(s)	14.53±4.91	14.15±3.27	0.80	0.423
Peak time(s)	18.53±4.98	19.81±6.49	1.91	0.057
Rising slope	0.92±0.32	0.90±0.19	0.67	0.503
Falling slope	0.05±0.04	0.06±0.05	1.91	0.057
Relative peak intensity	2.97±0.87	0.96±0.24	28.14	<0.001
Relative area under the curve	101.32±31.07	43.36±11.23	22.10	0.010
Relative start time(s)	−3.33±0.30	−0.19±0.06	129.90	0.020
Relative peak time(s)	5.53±0.68	5.64±0.67	1.42	0.157
Relative rising slope	0.25±0.05	0.51±0.04	1.94	0.054
Relative falling slope	−0.02±0.01	−0.02±0.01	0.00	1.000