| Order / Lane | Bib | ATHLETE | COUNTRY | PB | SB 2012 | 
|---|---|---|---|---|---|
| 2 | BEL | Belgium Junior |  BEL | 44.88 | 44.88 | 
| 3 | POL | Poland Junior |  POL | 44.59 | 45.02 | 
| 4 | GER | Germany Junior |  GER | 43.42 | 44.27 | 
| 5 | GBR | Great Britain & N.I. Junior |  GBR | 44.16 | 44.47 | 
| 6 | NGR | Nigeria Junior |  NGR | 43.44 | 44.58 | 
| 7 | USA | United States Junior |  USA | 43.29 | 43.95 | 
| 8 | BRA | Brazil Junior |  BRA | 43.98 | 44.79 | 
| 9 | NED | Netherlands Junior |  NED | 44.09 | 44.68 |