Table 5

The percentage of laminae in which laminae screw placement was considered feasible in subgroups according to ethnicity and gender.

CohortOD Right >5.5 mmOD Left >5.5 mmID Right
>3.5 mm		ID Left
>3.5 mm
NZE men89%82%54%56%a
NZE women79%b 77%40%b 42%a , b
Māori men96%b 94%68%b 83%b , c
Māori women72%72%36%48%c
P value 0.007 0.076 0.017 <0.001

  • Abbreviations: ID, inner diameter; NZE, New Zealand European; OD, outer diameter.

  • Note: Statistical significance was assessed for using the χ 2 test. Significant P values appear in bold type.

  • ↵a NZE men: NZE women

  • ↵b NZE women: Māori men

  • ↵c Māori men: Māori women