Event window	Type	Disclosed samples’ CAR	Undisclosed samples’ CAR	Difference	T/Z value
(−10, −10)	Mean	−0.014918	−0.022559	0.007640	7.183458^***
(−10, −10)	Median	−0.013994	−0.022035	0.008041	−7.084978^***
(−10, −9)	Mean	−0.011567	−0.015936	0.004369	3.284896^***
(−10, −9)	Median	−0.009498	−0.014181	0.004683	−3.545028^***
(−10, −8)	Mean	−0.011473	−0.015003	0.003530	2.343842^**
(−10, −8)	Median	−0.008787	−0.014124	0.005337	−2.852598^***
(−10, −7)	Mean	−0.010325	−0.011875	0.001550	0.903846
(−10, −7)	Median	−0.007763	−0.011909	0.004147	−1.309294
(−10, −6)	Mean	−0.013135	−0.015725	0.002590	1.281664
(−10, −6)	Median	−0.011200	−0.014853	0.003653	−1.590775
(−10, −5)	Mean	−0.014363	−0.018503	0.004140	1.885935^*
(−10, −5)	Median	−0.009887	−0.016144	0.006256	−1.974774^**
(−10, −4)	Mean	−0.028509	−0.037347	0.008838	3.240453^***
(−10, −4)	Median	−0.026023	−0.037962	0.011939	−3.929731^***
(−10, −3)	Mean	−0.036023	−0.047931	0.011908	3.868711^***
(−10, −3)	Median	−0.031223	−0.046195	0.014973	−4.401451^***
(−10, −2)	Mean	−0.041764	−0.052511	0.010747	2.829638^***
(−10, −2)	Median	−0.037024	−0.049280	0.012256	−3.069522^***
(−10, −1)	Mean	−0.033846	−0.042275	0.008429	2.288374^**
(−10, −1)	Median	−0.033838	−0.042328	0.008490	−2.681296^***
(−10, 1)	Mean	−0.030563	−0.035335	0.004772	1.174551
(−10, 1)	Median	−0.030963	−0.035624	0.004661	−1.623451
(−10, 2)	Mean	−0.032791	−0.038863	0.006072	1.497010
(−10, 2)	Median	−0.031812	−0.038453	0.006641	−1.831567^*