Table 9.
Mean values of observations for the case group.
| Variable | Subjects (N) | Mean | Standard deviation | Minimum | Maximum | Median |
|---|---|---|---|---|---|---|
| Last tonsillitis (weeks ago) | 4 | 3.75 | 3.10 | 1.00 | 8.00 | 3 |
| Episodes of tonsillitis per year | 5 | 2.00 | 2.35 | 0.00 | 6.00 | 1.00 |
| When quit smoking (weeks ago) | 3 | 312.00 | 187.49 | 156.00 | 520.00 | 260.00 |
| Num. of cigarettes per day | 3 | 7.33 | 10.97 | 1.00 | 20.00 | 1.00 |
| Last dental cleaning (weeks ago) | 8 | 226.88 | 162.92 | 43.00 | 520.00 | 234.00 |
| Size of tonsiliths (mm) | 10 | 4.50 | 1.08 | 3.00 | 6.00 | 4.50 |
| Age of subject (years) | 10 | 42.70 | 22.39 | 17.00 | 82.00 | 39.00 |