From: Dental anxiety in patients attending a student dental clinic
Age | N | Mean | s.d. | Lower bound 95% confidence interval | Upper bound 95% confidence interval |
---|---|---|---|---|---|
Under 30 years | 20 | 12.15 | 5.47 | 9.58 | 14.71 |
31–50 years | 36 | 11.80 | 5.26 | 10.02 | 13.58 |
51 plus years | 43 | 9.34 | 4.57 | 7.94 | 10.75 |