Table 4 Discriminative validity of generic OIDP: association of OIDP with presence or absence of hypodontia, the severity of hypodontia and anterior or upper anterior localisation of hypodontia

Presence of hypodontia

Non-hypodontia

2.8 (3.9)

62.4 (63)

1

1

Hypodontia

4.1 (6.0)

0.3

64.5 (40)

1.1 (0.6 – 2.1)

1.0 (0.5 – 2.0)

Severity of hypodontia

Non-hypodontia

2.8 (3.9)

62.4 (63)

1

1

Mild (1–5 teeth missing)

3.5 (4.7)

0.2

64.5 (20)

1.1 (0.5 – 2.5)

1.1 (0.5 – 2.6)

Severe (≥ 6 teeth missing)

4.7 (7.0)

0.4

64.5 (20)

1.0 (0.7 – 1.6)

0.9 (0.6 – 1.4)

All anterior hypodontia

Non-hypodontia

2.8 (3.9)

62.4 (63)

1

1

Anterior hypodontia^b

4.8 (6.6)

0.4

74.4 (32)

1.8 (0.8 – 3.9)

1.6 (0.7 – 3.5)

Other hypodontia

2.5 (4.1)

0.1

42.1 (8)

0.7 (0.4 – 1.1)

0.6 (0.4 – 1.0)

Upper anterior hypodontia

Non-hypodontia

2.8 (3.9)

62.4 (63)

1

1

Upper anterior hypodontia^c

5.7 (7.3)^*

0.5

75.0 (24)

1.8 (0.7 – 4.4)

1.6 (0.7 – 4.0)

Other hypodontia

2.4 (3.5)

0.1

53.3 (16)

0.8 (0.6 – 1.3)

0.8 (0.5 – 1.2)