| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1564 | Luguelín SANTOS |  DOM | 45.04 Q | 0.187 | 
| 2 | 2790 | Oscar Pistorius |  RSA | 45.44 Q SB | 0.236 | 
| 3 | 2179 | Rusheen MCDONALD |  JAM | 46.67 | 0.243 | 
| 4 | 3126 | Vitaliy Butrym |  UKR | 47.62 | 0.165 | 
| 2806 | Maksim Dyldin |  RUS | DQ | 0.190 | |
| 2619 | Ahmed Mohamed Al-Merjabi |  OMA | DNS | ||
| 3047 | Renny QUOW |  TTO | DNS | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 2005 | Kirani JAMES |  GRN | 45.23 Q | 0.173 | 
| 2 | 1105 | Ramon Miller |  BAH | 45.57 Q | 0.160 | 
| 3 | 2078 | Liemarvin BONEVACIA |  IOA | 45.60 Q PB | 0.232 | 
| 4 | 1212 | Isaac MAKWALA |  BOT | 45.67 | 0.211 | 
| 5 | 3046 | Deon LENDORE |  TTO | 45.81 | 0.205 | 
| 6 | 1281 | Daundre Barnaby |  CAN | 46.04 | 0.171 | 
| 7 | 1682 | Bereket Desta |  ETH | 47.40 | 0.224 | 
| 8 | 2637 | Bahaa Al Farra |  PLE | 49.93 SB | 0.212 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1132 | Jonathan BORLÉE |  BEL | 44.43 Q NR | 0.179 | 
| 2 | 1519 | Pavel MASLÁK |  CZE | 44.91 Q NR | 0.186 | 
| 3 | 2835 | Pavel Trenikhin |  RUS | 45.00 Q PB | 0.194 | 
| 4 | 2177 | Dane Hyatt |  JAM | 45.14 q | 0.261 | 
| 5 | 2120 | Donald Blair-Sanford |  ISR | 45.71 NR | 0.168 | 
| 6 | 2641 | Nelson Stone |  PNG | 46.71 SB | 0.193 | 
| 7 | 2274 | Sergey Zaykov |  KAZ | 47.12 | 0.209 | 
| 8 | 1262 | Ak. Hafiy Tajuddin Rositi |  BRU | 48.67 PB | 0.188 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1108 | Demetrius Pinder |  BAH | 44.92 Q | 0.151 | 
| 2 | 3241 | Bryshon Nellum |  USA | 45.29 Q | 0.191 | 
| 3 | 2374 | Youssef Ahmed MASRAHI |  KSA | 45.43 Q PB | 0.147 | 
| 4 | 2124 | Tabarie Henry |  ISV | 45.43 q | 0.176 | 
| 5 | 3345 | Alberth Bravo |  VEN | 45.61 q PB | 0.197 | 
| 6 | 2175 | Jermaine Gonzales |  JAM | 46.21 | 0.171 | 
| 7 | 2519 | Kristijan Erfemov |  MKD | 47.92 PB | 0.229 | 
| 8 | 2534 | Thet Zaw Win |  MYA | 50.07 | 0.181 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1100 | Chris Brown |  BAH | 45.40 Q | 0.171 | 
| 2 | 3235 | Tony MCQUAY |  USA | 45.48 Q | 0.155 | 
| 3 | 1816 | Nigel Levine |  GBR | 45.58 Q | 0.148 | 
| 4 | 2224 | Yuzo Kanemaru |  JPN | 46.01 | 0.156 | 
| 5 | 2391 | Janis Leitis |  LAT | 46.41 | 0.159 | 
| 6 | 2626 | Augusto Stanley |  PAR | 47.21 | 0.190 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1060 | Steven SOLOMON |  AUS | 45.18 Q PB | 0.145 | 
| 2 | 3044 | Lalonde Gordon |  TTO | 45.43 Q | 0.178 | 
| 3 | 1842 | Conrad Williams |  GBR | 46.12 Q | 0.164 | 
| 4 | 2041 | Marcell Deák Nagy |  HUN | 46.17 | 0.186 | 
| 5 | 2025 | Winston GEORGE |  GUY | 46.86 | 0.245 | 
| 6 | 2084 | Sajjad HASHEMI |  IRI | 47.75 | 0.171 | 
| 3237 | LaShawn Merritt |  USA | DNF | 0.195 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1133 | Kévin BORLÉE |  BEL | 45.14 Q | 0.166 | 
| 2 | 1831 | Martyn ROONEY |  GBR | 45.36 Q | 0.186 | 
| 3 | 2968 | Rabah YOUSIF |  SUD | 45.46 Q | 0.203 | 
| 4 | 1448 | Nery Brenes |  CRC | 45.65 | 0.237 | 
| 5 | 1556 | Erison Hurtault |  DMA | 46.05 SB | 0.158 | 
| 6 | 2661 | Marcin Marciniszyn |  POL | 46.35 | 0.180 | 
| 1149 | Mathieu Gnanligo |  BEN | DNF | 0.168 |