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Table 4 Results from CC and MI frailty models for 2-piece exponential model with 12 month cut point (hypothesis-driven model)

From: Piecewise exponential models to assess the influence of job-specific experience on the hazard of acute injury for hourly factory workers

  Complete case analysis (N=33 427 jobs for 13 427 employees) Multiple imputation (N=191 692 jobs for 81 301 employees)
  HR (95% CI) P-value HR (95% CI) P-value
0-12 Months (inexperienced period) 1.32 (1.26, 1.38) <.001 1.25 (1.23, 1.28) <.001
Male gender 0.62 (0.57, 0.68) <.001 0.71 (0.68, 0.73) <.001
Non-White 1.08 (1.00, 1.17) 0.061 0.97 (0.93, 1.00) 0.073
First job at company 0.88 (0.79, 0.98) 0.017 0.90 (0.87, 0.93) <.001
Age at start of job 0.98 (0.98, 0.99) <.001 0.99 (0.98, 0.99) <.001
Physical demand 1.25 (1.22, 1.29) <.001 1.26 (1.24, 1.29) <.001
Smelter plant 1.25 (1.18, 1.33) <.001 1.30 (1.24, 1.29) <.001
Union plant 1.15 (1.04, 1.27) 0.008 1.30 (1.23, 1.37) <.001
Original plant 1.01 (0.83, 1.22) 0.952 1.58 (1.50, 1.65) <.001