Table 3

Summary of the neurological test batteries used in some of the studies

ReferenceTypes of neurological testsSymbol digitDigit spanSanta AnaSimple reaction timeSyntactic reasoning(s)
Bazylewicz-Walczak et al21Polish NCTB/WAIS (Symbol Degit)ndndnd**nd
Cole et al11NCTBnmnmnmndnd
Daniell et al12NES*ndndndnd
Farahat et al14Unknown******(f)†
***(b)‡		ndndnd
Fiedler et al15WAIS-R**nd***nd
London et al 16WAIS-Rnmnm***nmnd
Maizlish et al25WAIS***ndndndnd
Roldan-Tapia et al18WAIS*** §*** §ndndnd
Ross et al17WAISnd***ndndnd
Rothlein et al32Unknown**(f)†
***(b)‡		nd*nd
Srivastava et al29Unknown******ndndnd
Steenland et al30NES**nd*nd
Stephens et al19Unknown****nd*****
Stephens et al31NES/ACTnmnmndnmnm
Stephens et al1NES/ACT**nd**** (ACTS)

  • ***p<0.05, **0.05 ≦ p<0.1, *p>0.1.

  • The exposed groups were slower or had poorer outcomes than the control groups.

  • †(f) Digit Span Forward.

  • ‡(b) Digit Span Backward.

  • §Whether the obtained results were positive or negative was not reported in the study.

  • nd, subsets of neurological tests were not performed;

  • nm, subsets of neurological tests were performed but p values were not reported.