  An unbiased search of molecular outflows within the region of the COHRS
survey has identified 157 high-mass outflows from a sample of 770 ATLASGAL
clumps with a detection rate of 20\%. The detection rate of outflows increases
for clumps with higher M$_{clump}$, L$_{bol}$, L$_{bol}$/M$_{clump}$,
N$_{H_{2}}$, and T$_{dust}$ compared to the clumps with no outflow. The
detection rates of the outflow increases from protostellar (8\%) to YSO clump
(17\%) and to MSF clump (29\%). The detection rate 26\% for quiescent clump is
preliminary, because the sample of quiescent clumps is small. A statistical
relation between the outflow and clump masses for our sample is
$\log(M_{out}/M_{\bigodot}) = (-1.1\pm0.21) +
(0.9\pm0.07)\log(M_{clump}/M_{\bigodot})$. The detection rate of outflows and
the outflow mass-loss rate show an increase with increasing M$_{clump}$,
L$_{bol}$, N$_{H_{2}}$, and T$_{dust}$, which indicates that clumps with
outflow with higher parameter values are at a more advanced evolutionary stage.
The outflow mechanical force increases with increasing bolometric luminosities.
No clear evidence has yet been found that higher mass outflows have different
launching conditions than low-mass outflows.
