Table 3 Clinical and procedural factors that affect OT based on residency level

Operation time (OT)

113 (± 43)

100 (± 38)

 < 0.001^b*

Patient Age

5.7 (± 2)

5.8 (± 2)

0.07^£

Patient Health

 Healthy

513 (79%)

263 (81%)

0.302ω

 Medically compromised

136 (21%)

63 (19%)

Patient occlusion

 Primary

359 (55%)

200 (57%)

0.05^¥

 Mixed

240 (36%)

105 (30%)

 Permanent

59 (9%)

44 (13%)

Treatment type

 Extraction

8 (1%)

11 (3%)

0.051ω

 Restoration

92 (14%)

39 (11%)

 Combined

558 (85%)

299 (86%)

Total treated teeth

13 (9–16)

13 (9–15)

0.186 α

Total dental procedure

16 (13–19)

15 (13–18)

 < 0.001 α*

Sextants involved

5 (5–6)

5 (5–6)

0.18 α

Radiograph

0 (0–3)

0 (0–2)

0.006 α*

Posterior restorations

 One-surface

0 (0–1)

0 (0–1)

0.304 α

 Multi-surfaces

0 (0–0)

0 (0–0)

0.170 α

Anterior restorations

 One-surface

1 (0–2)

1 (0–2)

0.536 α

 Multi-surfaces

0 (0–2)

0 (0–1)

0.008 α*

Sealants

2 (0–4)

1 (0–4)

0.106 α

Primary pulp therapy

1 (0–3)

1 (0–2)

0.045 α*

Stainless steel crown

4 (2–6)

4 (1–6)

0.195 α

Extraction

4 (2–7)

4 (2–7)

0.663 α

Oral Surgery

 No

651 (99%)

344 (99%)

0.691ω

 Yes

6 (1%)

5 (1%)