Table 9.
Comparison of prevalence ratios and respective confidence interval estimates (obtained by unadjusted Poisson/Cox regression, Poisson regression with scale factor adjusted by χ2 and deviance, Poisson/Cox regression with robust variances, log-binomial regression and logistic regression) and odds ratio with confidence interval estimate (obtained by logistic regression) with the Mantel-Haenszel prevalence ratio in the analysis of the original and modified data using mother in a paid job as the outcome, father living with the family as the risk factor and social class as confounder (situation3).
| Original data | Point estimate | 95% Confidence interval | ||||
| value | % diff. | lower | upper | width | % diff. | |
| PR Mantel-Haenszel | 1.69 | -- | 1.52 | 1.87 | 0.35 | -- |
| PR Poisson/Cox (unadj) | 1.68 | -0.3% | 1.41 | 2.00 | 0.59 | 68.6% |
| PR Poisson (χ2) | 1.68 | -0.3% | 1.49 | 1.90 | 0.41 | 17.2% |
| PR Poisson (deviance) | 1.68 | -0.3% | 1.46 | 1.94 | 0.48 | 35.9% |
| PR Poisson/Cox (robust) | 1.68 | -0.3% | 1.52 | 1.86 | 0.35 | -1.5% |
| PR log-binomial | 1.62 | -4.0% | 1.47 | 1.78 | 0.32 | -10.4% |
| OR logistic regression | 3.75 | 122.6% | 2.72 | 5.17 | 2.45 | 597.6% |
| Modified data | Point estimate | 95% Confidence interval | ||||
| value | % diff. | lower | upper | width | % diff. | |
| PR Mantel-Haenszel | 1.58 | -- | 1.39 | 1.79 | 0.40 | -- |
| PR Poisson/Cox (unadj) | 1.61 | 2.0% | 1.31 | 1.97 | 0.66 | 63.2% |
| PR Poisson (χ2) | 1.61 | 2.0% | 1.40 | 1.85 | 0.45 | 10.3% |
| PR Poisson (deviance) | 1.61 | 2.0% | 1.37 | 1.89 | 0.53 | 31.0% |
| PR Poisson/Cox (robust) | 1.61 | 2.0% | 1.42 | 1.83 | 0.41 | 2.1% |
| PR log-binomial | 1.71 | 8.7% | 1.53 | 1.92 | 0.39 | -4.7% |
| OR logistic regression | 2.97 | 88.1% | 2.14 | 4.11 | 1.96 | 385.9% |