| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 1141 | Tomasz Czubak |  POL | 45.13 Q PB | 0.191 | 
| 2 | 1454 | Jerome Davis |  USA | 45.25 Q | 0.136 | 
| 3 | 533 | Mark Richardson |  GBR | 45.26 Q | 0.188 | 
| 4 | 1293 | Matija Å estak |  SLO | 45.47 Q NR | 0.123 | 
| 5 | 1075 | Clement Chukwu |  NGR | 45.95 q | 0.136 | 
| 6 | 833 | Kenji Tabata |  JPN | 46.42 SB | 0.163 | 
| 7 | 1200 | Adriaan Botha |  RSA | 46.44 | 0.144 | 
| 8 | 345 | Carlos Santa |  DOM | 46.80 | 0.218 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 993 | Alejandro Manuel Cárdenas |  MEX | 45.34 Q | 0.151 | 
| 2 | 1481 | Michael Johnson |  USA | 45.35 Q | 0.172 | 
| 3 | 1558 | Philip Mukomana |  ZIM | 45.63 Q PB | 0.339 | 
| 4 | 1033 | Eric Milazar |  MRI | 45.90 Q | 0.181 | 
| 5 | 862 | Kennedy Ochieng |  KEN | 46.13 q | 0.181 | 
| 6 | 534 | Solomon Wariso |  GBR | 46.61 | 0.152 | 
| 7 | 302 | Evripides Demosthenous |  CYP | 46.72 | 0.125 | 
| 8 | 722 | Paul McBurney |  IRL | 46.87 | 0.150 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 815 | Michael McDonald |  JAM | 45.13 Q SB | 0.253 | 
| 2 | 1316 | Sugath Thilakaratne |  SRI | 45.73 Q | 0.201 | 
| 3 | 1187 | Ibrahim Ismail Muftah |  QAT | 45.94 Q SB | 0.351 | 
| 4 | 1076 | Udeme Ekpeyong |  NGR | 46.25 q | 0.262 | 
| 5 | 204 | Shane Niemi |  CAN | 46.33 q | 0.170 | 
| 6 | 1235 | Dmitriy Golovastov |  RUS | 46.53 | 0.161 | 
| 7 | 1554 | Bothwell Nachihulu |  ZAM | 48.10 | 0.182 | 
| 1498 | Antonio Pettigrew |  USA | DQ | 0.197 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 153 | Sanderlei Parrela |  BRA | 45.15 Q | 0.168 | 
| 2 | 358 | David Canal |  ESP | 45.36 Q SB | 0.140 | 
| 3 | 1149 | Robert Mackowiak |  POL | 45.51 Q SB | 0.231 | 
| 4 | 1215 | Arnaud Malherbe |  RSA | 45.56 Q | 0.211 | 
| 5 | 814 | Danny McFarlane |  JAM | 45.58 q | 0.249 | 
| 6 | 1074 | Sunday Bada |  NGR | 45.61 q | 0.217 | 
| 7 | 832 | Masayoshi Kan |  JPN | 46.20 q SB | 0.148 | 
| 224 | Benjamin Youla |  CGO | DNS | 0.000 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 516 | Jamie Baulch |  GBR | 45.51 Q | 0.156 | 
| 2 | 1281 | Ibrahima Wade |  SEN | 45.76 Q | 0.269 | 
| 3 | 1160 | Piotr Rysiukiewicz |  POL | 46.12 Q | 0.275 | 
| 4 | 646 | Anastásios Goúsis |  GRE | 46.60 | 0.145 | 
| 5 | 1350 | Marcel Lopuchovský |  SVK | 46.97 | 0.248 | 
| 6 | 863 | Abednego Matilu |  KEN | 47.42 | 0.166 | 
| 1410 | Neil de Silva |  TTO | DQ | 0.161 | |
| 1513 | Jerome Young |  USA | DQ | 0.141 | 
| POS | BIB | ATHLETE | COUNTRY | MARK | Reaction Time | 
|---|---|---|---|---|---|
| 1 | 156 | Anderson Jorge dos Santos |  BRA | 45.72 Q | 0.151 | 
| 2 | 808 | Gregory Haughton |  JAM | 45.87 Q | 0.165 | 
| 3 | 834 | Jun Osakada |  JPN | 45.94 Q | 0.159 | 
| 4 | 1227 | Jopie van Oudtshoorn |  RSA | 45.98 Q | 0.174 | 
| 5 | 465 | Marc Foucan |  FRA | 46.13 q | 0.222 | 
| 6 | 1338 | Mathias Rusterholz |  SUI | 46.43 | 0.174 | 
| 7 | 670 | Alleyne Francique |  GRN | 47.49 | 0.330 | 
| 8 | 1021 | Rachid Chouhal |  MLT | 48.32 NR | 0.219 |