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Table 4 Birth Certificate Compared with Interview for Paternal Occupation During Periconceptional Perioda

From: Validity of parental work information on the birth certificate

   Fathers employed according to both sources
Standard Occupational Classification (SOC) groupb Number (%) missing occupation on vital record Number by interview Number by birth certificatec Number by both sources Sensitivity (%) (95% CI) Specificity (%) (95% CI) Kappa
Management 4 (5.8) 65 58 41 63.1 (50.9 – 74.1) 95.8 (93.5 – 97.5) 0.62
Business/financial operations 0 (0.0) 12 11 9 75.0 (45.9 – 93.2) 99.6 (98.6 – 99.9) 0.78
Health diagnosing & treating practitioners 1 (8.3) 11 13 11 100 (76.2 – 100) 99.6 (98.6 – 99.9) 0.92
Food preparation & serving 12 (30.0) 27 11 10 37.0 (20.6 – 56.2) 99.8 (98.9 – 99.9) 0.51
Building and grounds cleaning and maintenance 6 (25.0) 18 10 8 44.4 (23.2 – 67.3) 99.6 (98.6 – 99.9) 0.56
Sales & related occupations 6 (12.8) 39 32 20 51.3 (35.8 – 66.6) 97.2 (95.4 – 98.5) 0.53
Office & administrative support 6 (13.6) 37 15 13 35.1 (21.1 – 51.4) 99.5 (98.5 – 99.9) 0.48
Farming, fishing, and forestry occupations 2 (14.3) 11 8 6 54.5 (25.9 – 81.0) 99.6 (98.6 – 99.9) 0.62
Construction 18 (22.5) 61 65 47 77.0 (65.3 – 86.3) 95.6 (93.3 – 97.3) 0.71
Extraction workers 1 (7.7) 12 8 6 50.0 (23.4 – 76.6) 99.6 (98.6 – 99.9) 0.59
Installation, maintenance, & repair 6 (16.2) 26 32 18 69.2 (49.8 – 84.6) 96.9 (94.9 – 98.2) 0.60
Production occupations 13 (18.6) 57 57 42 73.7 (61.2 – 83.9) 96.4 (94.3 – 97.9) 0.70
Transportation & material moving 12 (16.0) 59 58 41 69.5 (56.9 – 80.2) 95.9 (93.6 – 97.5) 0.70
Military-specific occupations 6 (23.1) 19 23 19 100 (85.4 – 100) 99.1 (97.9 – 99.7) 0.90
  1. a Three months before through three months postconception.
  2. b Only occupations with 10 or more workers by interview are shown in Table.
  3. cOne father each misclassified as not employed (student, disabled or retired, homemaker, unemployed) for food preparation and serving, sales, office support, agricultural, construction, and military occupations. Two fathers in transportation occupations and four fathers in installation/maintenance/repair occupations misclassified as unemployed.