Table 5 Discriminative validity of condition specific OIDP: association of condition specific OIDP and the presence or absence of hypodontia, the severity of hypodontia and anterior or upper anterior localisation of hypodontia

Presence of hypodontia

Non-hypodontia

0.3 (1.1)

9.9 (10)

1

1

Hypodontia

2.4 (5.5)^**

0.6

30.6 (19)^**

4.0 (1.7 – 9.4)

3.4 (1.4 – 8.0)

Severity of hypodontia

Non-hypodontia

0.3 (1.1)

9.9 (10)

1

1

Mild (1–5 teeth missing)

1.4 (4.2)

0.4

16.1 (5)

1.8 (0.5 – 5.6)

1.6 (0.5 – 5.2)

Severe (≥ 6 teeth missing)

3.4 (6.6)^**

0.8

45.2 (14)^**

2.7 (1.7 – 4.4)

2.5 (1.5 – 4.3)

All anterior hypodontia

Non-hypodontia

0.3 (1.1)

9.9 (10)

1

1

All anterior hypodontia^b

3.0 (6.3)^**

0.7

37.2 (16)^**

5.4 (2.2 – 13.3)

4.8 (1.9 – 12.0)

Other hypodontia

1.1 (3.3)

0.4

15.8 (3)

1.3 (0.7 – 2.6)

1.2 (0.6 – 2.4)

Upper anterior hypodontia

Non-hypodontia

0.3 (1.1)

9.9 (10)

1

1

Upper anterior hypodontia^c

3.8 (7.1)^**

0.9

43.8 (14)^**

7.1 (2.7 – 18.4)

7.0 (2.6 – 18.7)

Other hypodontia

0.9 (2.7)

0.3

16.7 (5)

1.3 (0.8 – 2.4)

1.1 (0.6 – 2.1)