Table 1.

The number (median (min, max)) of upward and downward referrals in Luohu district from 2017 to 2023

	n	Upward referrals	Downward referrals	Total
Years
2017	55	170 [123, 193]	434 [383, 521]	594 [526, 713]
2018	59	235 [103, 309]	506 [302, 609]	731 [405, 895]
2019	63	346 [152, 431]	579 [359, 900]	886 [511, 1306]
2020	61	341 [77, 477]	264 [26, 493]	531 [247, 938]
2021	62	396 [234, 548]	215 [1, 9039]	675 [258, 9473]
2022	59	286 [165, 412]	1892 [959, 2371]	2198 [1140, 2725]
2023	61	272 [120, 470]	2298 [1374, 2684]	2515 [1490, 3088]
Z	-	2.5776	4.7723	6.0961
P trend	-	< 0.01	< 0.001	< 0.001