| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | SUI | Switzerland U20 |
SUI
|
44.88 Q SB | 0.192 |
| 2 | CAN | Canada U20 |
CAN
|
45.23 Q SB | 0.195 |
| 3 | UKR | Ukraine U20 |
UKR
|
45.26 q | 0.162 |
| 4 | ESP | Spain U20 |
ESP
|
45.84 | 0.188 |
| 5 | CHI | Chile U20 |
CHI
|
46.15 | 0.156 |
| 6 | ECU | Ecuador U20 |
ECU
|
47.43 | 0.243 |
| GER | Germany U20 |
GER
|
DNF | 0.188 | |
| GBR | Great Britain & NI U20 |
GBR
|
DQ | 0.175 |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | USA | United States U20 |
USA
|
44.22 Q SB | 0.169 |
| 2 | AUS | Australia U20 |
AUS
|
44.76 Q | 0.170 |
| 3 | POL | Poland U20 |
POL
|
45.00 q | 0.153 |
| 4 | IND | India U20 |
IND
|
45.31 NU20R | 0.199 |
| 5 | RSA | South Africa U20 |
RSA
|
46.61 SB | 0.133 |
| 6 | PER | Peru U20 |
PER
|
49.31 | 0.209 |
| TTO | Trinidad and Tobago U20 |
TTO
|
DQ | 0.183 | |
| HUN | Hungary U20 |
HUN
|
DNS |
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time |
|---|---|---|---|---|---|
| 1 | JAM | Jamaica U20 |
JAM
|
43.81 Q | 0.162 |
| 2 | PUR | Puerto Rico U20 |
PUR
|
45.28 Q NU20R | 0.184 |
| 3 | ITA | Italy U20 |
ITA
|
45.55 | 0.183 |
| 4 | SLO | Slovenia U20 |
SLO
|
45.63 NU20R | 0.162 |
| 5 | BOT | Botswana U20 |
BOT
|
46.43 NU20R | 0.186 |
| NGR | Nigeria U20 |
NGR
|
DQ | 0.174 | |
| FRA | France U20 |
FRA
|
DQ | 0.169 | |
| BRA | Brazil U20 |
BRA
|
DQ | 0.193 |