| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 66 | Avard Moncur |  BAH | 44.88 Q | 0.156 | 
| 2 | 946 | Marcus La Grange |  RSA | 45.20 Q | 0.181 | 
| 3 | 894 | Robert Mackowiak |  POL | 45.27 Q | 0.185 | 
| 4 | 132 | Anderson Jorge dos Santos |  BRA | 45.47 q SB | 0.143 | 
| 5 | 250 | Karel Bláha |  CZE | 45.82 PB | 0.166 | 
| 6 | 557 | Tomas Coman |  IRL | 45.90 SB | 0.182 | 
| 1130 | Yevheniy Zyukov |  UKR | DQ | 0.175 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 511 | Alleyne Francique |  GRN | 45.66 Q | 0.205 | 
| 2 | 429 | Mark Richardson |  GBR | 45.66 Q | 0.165 | 
| 3 | 902 | Piotr Rysiukiewicz |  POL | 45.92 Q | 0.175 | 
| 4 | 686 | Ezra Sambu |  KEN | 46.18 | 0.386 | 
| 5 | 284 | Amin Badany Goma'a |  EGY | 46.29 PB | 0.172 | 
| 6 | 580 | Alessandro Attene |  ITA | 46.56 | 0.166 | 
| 7 | 643 | Kenji Tabata |  JPN | 46.68 | 0.154 | 
| 8 | 1043 | Carlton Fortune |  SUR | 52.69 | 0.204 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 700 | Hamdan Odha Al-Bishi |  KSA | 45.00 Q SB | 0.148 | 
| 2 | 619 | Michael McDonald |  JAM | 45.02 Q | 0.167 | 
| 3 | 1032 | Sugath Thilakaratne |  SRI | 45.41 Q SB | 0.256 | 
| 4 | 1102 | Ato Stephens |  TTO | 45.82 | 0.306 | 
| 5 | 644 | Takahiko Yamamura |  JPN | 47.22 | 0.151 | 
| 6 | 230 | Álvaro James |  CRC | 47.46 | 0.186 | 
| 7 | 820 | Yoube Ould H'meïde |  MTN | 47.87 NR | 0.177 | 
| 1212 | Jerome Young |  USA | DQ | 0.174 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 816 | Eric Milazar |  MRI | 45.94 Q | 0.214 | 
| 2 | 886 | Piotr Dlugosielski |  POL | 46.49 Q | 0.190 | 
| 3 | 608 | Sanjay Ayre |  JAM | 46.96 | 0.168 | 
| 4 | 939 | Adriaan Botha |  RSA | 47.32 | 0.158 | 
| 5 | 22 | Kenmore Hughes |  ANT | 48.18 | 0.230 | 
| 6 | 714 | Mishal Al Harbi |  KUW | 48.19 | 0.138 | 
| 1193 | Antonio Pettigrew |  USA | DQ | 0.299 | |
| 1251 | Arnold Payne |  ZIM | DNF | 0.163 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 613 | Gregory Haughton |  JAM | 45.54 Q | 0.175 | 
| 2 | 292 | David Canal |  ESP | 45.60 Q | 0.190 | 
| 3 | 430 | Iwan Thomas |  GBR | 45.92 Q | 0.164 | 
| 4 | 55 | Chris Brown |  BAH | 46.01 | 0.181 | 
| 5 | 843 | Sunday Bada |  NGR | 46.12 | 0.267 | 
| 6 | 131 | Flávio Godoy |  BRA | 46.13 | 0.250 | 
| 7 | 774 | Muhamad Zaiful Zainal Abidin |  MAS | 46.46 | 0.181 | 
| 8 | 3 | Kerth Gumbs |  AIA | 57.83 | 0.179 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 470 | Ingo Schultz |  GER | 45.11 Q PB | 0.167 | 
| 2 | 1146 | Leonard Byrd |  USA | 45.35 Q | 0.302 | 
| 3 | 176 | Shane Niemi |  CAN | 45.41 Q | 0.233 | 
| 4 | 1058 | Jimisola Laursen |  SWE | 45.54 q NR | 0.207 | 
| 5 | 1027 | Rohan Pradeep Kumara |  SRI | 46.46 | 0.333 | 
| 6 | 1109 | Sofiane Labidi |  TUN | 47.03 | 0.222 | 
| 7 | 1225 | William Hernández |  VEN | 47.26 | 0.205 | 
| 8 | 1072 | Bheki Malima |  SWZ | 49.61 | 0.201 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 13 | Malik Louahla |  ALG | 45.13 Q NR | 0.163 | 
| 2 | 947 | Hendrick Mokganyetsi |  RSA | 45.15 Q | 0.198 | 
| 3 | 387 | Marc Raquil |  FRA | 45.55 Q | 0.210 | 
| 4 | 192 | Benjamin Youla |  CGO | 45.92 | 0.182 | 
| 5 | 412 | Jamie Baulch |  GBR | 46.15 SB | 0.155 | 
| 6 | 967 | Dmitriy Golovastov |  RUS | 46.22 | 0.159 | 
| 7 | 642 | Jun Osakada |  JPN | 46.86 | 0.168 | 
| 8 | 809 | Emmanuel De Lorenzi |  MON | 55.57 | 0.229 |