Table 3

Age-adjusted annual percentage change (APC) and estimated changes in slopes in yearly incidence rates of workplace injury deaths in New Zealand workers during three time periods with different legislation, 1985–2014

Pre
1985–1992
Post 1
1993–2002
Post 2
2003–2014
Change in slope
Post-1:PrePost-2:Post-1
Adj APC§ (95% CI)Adj APC§ (95% CI)Adj APC§ (95% CI)Coef.95% CIP valueCoef.95% CIP value
Overall: age adjusted−2.76 (−5.47 to −0.04)−2.90 (−4.50 to −1.29)−2.87 (−4.39 to −1.34)−0.001−0.042 to 0.0390.90.000−0.029 to 0.0291.0
Industry
 Historical high risk*−0.23 (−3.45 to 3.00)−1.47 (−3.36 to 0.41)−2.74 (−4.51 to −0.98)−0.013−0.059 to 0.3400.6−0.013−0.046 to 0.0200.4
 Specific high risk†
 Agriculture−0.51 (−4.68 to 3.66)−2.00 (−4.46 to 0.46)0.86 (−1.15 to 3.22)−0.015−0.076 to 0.0450.60.029−0.015 to 0.0720.2
 Construction−4.81 (−11.94 to 2.32)−4.41 (−8.93 to 0.10)−1.22 (−5.47 to 3.03)0.004−0.107 to 0.1150.90.033−0.048 to 0.1140.4
 Transport2.44 (−6.36 to 11.24)4.82 (0.08 to 9.56)−8.07 (−12.05 to −4.09)0.023−0.096 to 0.1420.7−0.131−0.209 to −0.0540.001
Occupation
 Historical high risk‡−3.13 (−6.91 to 0.64)1.37 (−0.92 to 3.67)−1.56 (−3.56 to 0.44)0.045−0.106 to 0.1020.1−0.029−0.068 to 0.0090.1
Specific high risk†
Fishery workers−6.66 (−16.01 to 2.68)1.30 (−5.68 to 8.27)−2.95 (−10.17 to 4.27)0.082−0.072 to 0.2350.3−0.043−0.170 to 0.0850.5
 Forestry workers6.96 (−3.18 to 17.11)−8.52 (−14.21 to −2.84)8.70 (2.46 to 14.93)−0.156−0.297 to −0.0160.030.1720.064 to 0.2810.002
 Farmers and workers−1.55 (−8.60 to 5.49)5.88 (1.94 to 9.81)−1.06 (−4.01 to 1.89)0.073−0.026 to 0.1720.2−0.068−0.127 to −0.0080.03
  • *In addition to the three specific industry groups listed, this estimate includes: mining, electricity/gas/water.

  • †Restricted to groups with >120 deaths over 30 years.

  • ‡In addition to the three specific occupational groups listed, this estimate includes: pilots/flight crew, Builder’s labourers, hunters/trappers, tour/outdoor guides, professional sportspeople, earthmoving plant operators, mining plant operators, railway workers, electrical lines workers/cable jointers, heavy truck/tanker drivers.

  • §Age-adjusted APC that is averaged % of previous year’s rate. Those for whom age was not available (n=17) were excluded.