Table 1.
Characteristics of participants with and without available salivary samples in the NFBC1966 46-year follow-up
| Categorical variables | Category | Saliva samples available n = 1,589 |
Saliva samples unavailable n = 5,515 |
|||
|---|---|---|---|---|---|---|
| Gender | Male | 736 (46.5%) | 2,547 (46.2%) | |||
| Female | 847 (53.5%) | 2,968 (53.8%) | ||||
| Total | 1,583 (99.6%) | 5,515 (100%) | ||||
| BMI | < 18.5 | 7 (0.4%) | 29 (0.7%) | |||
| 18.5–24.9 | 627 (39.6%) | 1,594 (38.2%) | ||||
| 25-29.9 | 621 (39.2%) | 1,648 (39.4%) | ||||
| ≥ 30 | 327 (20.7%) | 907 (21.7%) | ||||
| Total | 1,582 (99.6%) | 4,178 (75.8%) | ||||
| Smoking | No | 1,216 (79.3%) | 3,771 (73.0%) | |||
| Yes | 318 (20.7%) | 1,396 (27.0%) | ||||
| Total | 1,534 (96.5%) | 5,515 (100%) | ||||
|
Daily tooth brushing frequency |
≤ 1 | 440 (29.4%) | 105 (30.7%) | |||
| 2 | 1,013 (67.6%) | 226 (66.1%) | ||||
| ≥ 3 | 45 (3.0%) | 11 (3.2%) | ||||
| Total | 1,498 (94.3%) | 342 (6.2%) | ||||
| Dentine caries lesions (ICDAS 4–6) | 0 | 947 (60.8%) | 207 (57.3%) | |||
| > 0 | 610 (39.2%) | 154 (42.7%) | ||||
| Total | 1,557 (98.0%) | 361 (6.5%) | ||||
| Snacks consumption a | Low | 741 (48.6%) | 180 (50.4%) | |||
| Moderate | 689 (45.2%) | 149 (41.7%) | ||||
| High | 95 (6.2%) | 28 (7.8%) | ||||
| Total | 1,525 (96.0%) | 357 (6.5%) | ||||
| Continuous variables |
Saliva samples available n = 1,589 |
Saliva samples unavailable n = 5,515 |
||||
| Mean (SD) | Total | Mean (SD) | Total | |||
| DMFT score | 14.82 (5.11) | 1,557 | 15.20 (5.38) | 362 | ||
| Dentine caries lesions (ICDAS 4–6) | 0.93 (1.79) | 1,557 | 1.21 (2.07) | 361 | ||
| Enamel caries surfaces (ICDAS 1–3) | 29.34 (14.99) | 1,558 | 30.18 (15.60) | 361 | ||
| Physical fitness b | 40.47 (10.80) | 1,479 | 41.04 (11.48) | 3,713 | ||
| Physical activity c | 31.63 (20.55) | 1,529 | 31.71 (20.84) | 3,912 | ||
| Annual household income (€) d | 68,537 (70,613.38) | 1,416 | 70,715 (302,814.71) | 4,597 | ||
aSelf-reported consumption of beverages, candy, or snacks. Higher value indicates more frequent consumption
bMeasured as heart rate recovery in bpm in the 60 s after a step test normalized to peak heart rate
cAmount of vigorous and very vigorous activity, measured by MET-values and reported as minutes/day
dTotal household income before taxes
Percentages for category rows are calculated among participants with available data for that variable. Total rows indicate the number and proportion of participants with available data