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Table 6 Birth certificate compared with interview for paternal industrial sectors of work during periconceptional perioda

From: Validity of parental work information on the birth certificate

   Fathers employed according to both sources
North American Industry Classification System (NAICS) industrial sectorb Number (%) missing industry on vital record Number by interview Number by birth certificatec Number by both sources Sensitivity (%) (95% CI) Specificity (%) (95% CI) Kappa
Agriculture, forestry, fishing & hunting 3 (14.3) 17 17 13 76.5 (52.5 – 92.0) 99.1 (97.8 – 99.7) 0.76
Mining 1 (7.1) 13 11 8 61.5 (34.1 – 84.3) 99.3 (98.2 – 99.8) 0.66
Construction 22 (24.4) 67 77 51 76.1 (64.9 – 85.2) 93.4 (90.6 – 95.6) 0.66
Manufacturing 15 (16.1) 77 71 55 71.4 (60.6 – 80.7) 95.8 (93.5 – 97.5) 0.69
Wholesale & retail trade 17 (18.9) 71 68 52 73.2 (62.1 – 82.6) 95.9 (93.6 – 97.6) 0.70
Transportation & warehousing 6 (14.6) 35 32 24 68.6 (51.9 – 82.2) 98.1 (96.5 – 99.1) 0.69
Professional, scientific, & technical services 0 (0.0) 12 14 9 75.0 (45.9 – 93.2) 98.9 (97.7 – 99.6) 0.68
Administration & support; waste management 8 (38.1) 11 14 6 54.5 (25.9 – 81.0) 98.2 (96.7 – 99.2) 0.47
Educational services 2 (9.5) 19 19 17 89.5 (69.4 – 98.2) 99.5 (98.5 – 99.9) 0.89
Health care & social assistance 2 (7.4) 22 22 19 86.4 (67.2 – 96.4) 99.3 (98.2 – 99.8) 0.86
Accommodation & food services 10 (25.0) 29 21 18 62.1 (43.7 – 78.2) 99.3 (98.1 – 99.8) 0.70
Other services (except public administration) 2 (6.3) 28 27 20 71.4 (52.9 – 85.8) 98.4 (96.8 – 99.3) 0.71
Public administration 7 (13.0) 46 47 42 91.3 (80.3 – 97.2) 98.8 (97.4 – 99.6) 0.89
  1. a Three months before through three months postconception
  2. b Only industries with 10 or more workers by interview are shown in Table.
  3. cOne father each misclassified as unemployed for agricultural, construction, manufacturing, accommodation/food service, and public administration sectors. Two fathers each misclassified as unemployed for wholesale/retail trade, administration/support and other services sectors. Three fathers in the health care/social assistance sector misclassified as unemployed.