Table 4 Comparison of the complete-case dataset and the dataset with imputed values (multiple imputation), the Norwegian Women and Cancer Study, 1996–2013
Characteristics | Missing, N(%) | Complete-case | Multiple imputation |
|---|---|---|---|
Total coffee consumption-baseline, mean (SD) | 0 (0.0) | 3.9 (2.5) | 3.9 (2.5) |
Total coffee consumption-follow-up, mean (SD) | 21,011 (22.9) | 3.4 (2.2) | 3.4 (2.2) |
Filtered coffee consumption-baseline, mean (SD) | 0 (0.0) | 2.6 (2.4) | 2.6 (2.4) |
Filtered coffee consumption-follow-up, mean (SD) | 27,953 (30.5) | 2.5 (2.2) | 2.5 (2.2) |
Instant coffee consumption-baseline, mean (SD) | 0 (0.0) | 0.3 (1.1) | 0.3 (1.1) |
Instant coffee consumption-follow-up, mean (SD) | 27,953 (30.5) | 0.4 (1.0) | 0.4 (1.0) |
Boiled coffee consumption-baseline, mean (SD) | 0 (0.0) | 0.9 (2.0) | 0.9 (2.0) |
Boiled coffee consumption-follow-up, mean (SD) | 27,953 (30.5) | 0.5 (1.4) | 0.5 (1.4) |
Smoking status, % | |||
Never | 1595 (1.5) | 34.6 | 34.7 |
Former | 32.2 | 32.2 | |
Current | 33.1 | 33.1 | |
Duration of education (y), mean (SD) | 5184 (5.0) | 12.1 (3.4) | 12.0 (3.4) |
Body mass index, mean (SD) | 2379 (2.3) | 24.0 (3.8) | 24.0 (3.8) |
Physical activity level, mean (SD) | 9560 (9.2) | 5.6 (1.9) | 5.6 (1.9) |
Alcohol consumption (g/day), mean (SD) | 1686 (1.6) | 3.2 (5.4) | 3.2 (5.4) |
Average number of sunburns per year, mean (SD) | 11,103 (10.7) | 0.8 (0.7) | 0.8 (0.7) |
Original hair color, % | |||
Dark | 1587 (1.5) | 17.3 | 17.3 |
Brown | 39.7 | 39.6 | |
Blond | 40.0 | 40.1 | |
Ginger | 3.0 | 3.0 | |
Number of moles larger than 5 mm, % | |||
0 | 10,444 (10.0) | 88.6 | 88.7 |
1 | 6.6 | 6.6 | |
2–3 | 3.2 | 3.2 | |
4–6 | 0.9 | 0.9 | |
7–12 | 0.4 | 0.4 | |
13–24 | 0.1 | 0.1 | |
≥25 | 0.1 | 0.1 | |
Area of residence | 0 (0.0) | ||
Oslo area | 8.9 | 8.9 | |
Eastern Norway | 35.1 | 35.1 | |
Southern Norway | 4.7 | 4.7 | |
Western Norway | 21.5 | 21.5 | |
Middle Norway | 8.0 | 8.0 | |
Northern Norway | 21.8 | 21.8 | |