Table 4.
Birth Certificate Compared with Interview for Paternal Occupation During Periconceptional Perioda
| 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 |
a Three months before through three months postconception.
b Only occupations with 10 or more workers by interview are shown in Table.
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.