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Table 4 Zero Inflated Negative Binomial model of total work absence 1994–2008. IRR for education

From: Exposure to different lengths of sick leave and subsequent work absence among young adults

     University vs Upper secondary Elementary vs Upper secondary
Sick leave 1993 Elementary Mean(SD) Upper secondary Mean(SD) University Mean(SD) Adjusted IRR 95 % CI p-value Adjusted IRR 95 % CI p-value
0 n = 11847 626 (901) n = 79248 300 (542) n = 28595 209 (399) 0.75 0.73–0.76 <.0001 1.81 1.76–1.86 <.0001
1–7 n = 770 942 (1063) n = 3601 510 (751) n = 469 346 (609) 0.73 0.63–0.83 <.0001 1.76 1.58–1.95 <.0001
8–14 n = 406 972 (1149) n = 1683 558 (811) n = 214 340 (584) 0.63 0.52–0.77 <.0001 1.60 1.38–1.85 <.0001
15–28 n = 480 1067 (1239) n = 1793 618 (881) n = 232 419 (773) 0.67 0.55–0.81 <.0001 1.68 1.46–1.92 <.0001
29–59 n = 499 1152 (1244) n = 1747 744 (1017) n = 192 568 (920) 0.75 0.61–0.92 0.0069 1.44 1.26–1.65 <.0001
60–89 n = 221 1513 (1445) n = 730 797 (1050) n = 79 819 (1190) 1.02 0.75–1.40 0.8798 1.80 1.47–2.20 <.0001
90–119 n = 131 1387 (1413) n = 411 1029 (1234) n = 48 651 (892) 0.68 0.45–1.02 0.0621 1.32 1.02–1.72 0.0346
  1. Adjusted for age, education, origin and county, IRR (Incidence-rate ratio) from the negative binominal part of the model