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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Am J Ind Med. 2015 Mar;58(3):252–266. doi: 10.1002/ajim.22419

TABLE AI.

Five-year Lagged Results for Exposure-related Variables, Using Quintile Cutpoints for Each Metrica

Analysis description N cases PY SIR 95% CI on SIR SRR 95% CI on SRR Trend slope (SE), P
Absorbed dose (mGy) 2.35E-05b(9.09E-06), 0.0097
 0 to <1.79 68 48,701 1.37 1.07, 1.74 1.0
 1.79 to <4.04 70 35,688 1.33 1.04, 1.68 0.98 0.68, 1.41
 4.04 to <8.12 67 31,901 1.45 1.12, 1.84 1.04 0.72, 1.49
 8.12 to <16.0 70 28,710 1.37 1.07, 1.73 1.08 0.75, 1.56
 16.0+ 68 17,477 1.34 1.04, 1.70 1.54 0.57, 4.13
SSI travel (hours) −8.02E-08 (1.04E-07), 0.44
 0 to <395 68 56,625 1.15 0.89, 1.46 1.0
 395 to <873 69 31,394 1.52 1.18, 1.92 1.30 0.92, 1.86
 873 to <1585 69 26,247 1.76 1.37, 2.23 1.52 1.06, 2.17
 1585 to <2996 69 28,588 1.30 1.01, 1.64 1.26 0.88, 1.80
 2996+ 68 19,623 1.28 0.99, 1.62 0.95 0.67, 1.35
Time zones crossed (n) −2.88E-08 (2.41E-08), 0.23
 0 to <933.9 69 52,838 1.21 0.94, 1.54 1.0
 933.9 to <1902 69 30,270 1.56 1.22, 1.98 1.24 0.86, 1.77
 1902 to <3740 68 31,195 1.51 1.17, 1.92 1.22 0.85, 1.76
 3740 to <7998 70 31,619 1.23 0.96, 1.56 1.16 0.80, 1.68
 7998+ 67 16,555 1.41 1.09, 1.79 0.94 0.65, 1.36
Empl. duration (days) −3.70E-08 (1.88E-08)b, 0.049
 0 to <853 68 51,313 1.37 1.06, 1.74 1.0
 853 to <1829 69 36,417 1.30 1.01, 1.65 0.97 0.68, 1.39
 1829 to <3229 68 29,256 1.52 1.18, 1.93 1.13 0.79, 1.61
 3229 to <6659 71 31,797 1.20 0.93, 1.51 0.97 0.67, 1.38
 6659+ 67 13,694 1.54 1.19, 1.95 0.85 0.60, 1.22

PY, person-years at risk; SIR, standardized incidence ratio; CI, confidence interval; SRR, standardized rate ratio; SE, standard error; SSI, standard sleep interval.

a

The date of diagnosis was changed for one subject to reduce the influence of a single cell with one event and little person-time.

b

Note that this significant slope appears to be a result of a single influential cell and is highly susceptible to cutpoint choice.