Table 2.

Demographic, clinical and X-ray data with respect to apical periodontitis

	No apical periodontitis (n = 71)	Apical periodontitis (n = 49)
	Number, mean ± SD	Number, mean ± SD	p*
Age (years)	51.44 ± 2.92	52.98 ± 2.73	0.001
Gender (women/men)	37/34	26/23	0.028
Education (higher/compulsory)	59/12	42/7	NS
Income (Swedich crowns ×1000)	1955 ± 860	1734 ± 654	< 0.001
Social status (high/low)	58/13	40/9	NS
Working status (working/not working)	65/6	48/1	NS
Smoking (yes/no)	17/54	25/24	0.009
Dental visits (years interval)	1.37 ± 0.76	1.53 ± 0.79	NS
Hospital visits (yes/no)	23/48	20/29	NS
Periodontal status (Perio/No perio)	44/27	39/10	0.003
Gingival Index	0.76 ± 0.96	1.25 ± 1.04	< 0.001
Plaque Index	0.31 ± 0.31	0.47 ± 0.52	< 0.001
Calculus Index	0.83 ± 0.10	0.19 ± 0.46	0.033
Bleeding on probing	0.26 ± 0.22	0.34 ± 0.24	NS
Clinical attachment loss (mm)	2.73 ± 0.89	3.40 ± 1.75	< 0.001
Probing depth (mm)	2.38 ± 0.61	2.82 ± 0.91	< 0.001
Total Dental Index (TDI)	1.03 ± 1.42	3.57 ± 1.73	< 0.001
Caries (TDI)	0.23 ± 0.54	0.35 ± 0.63	NS
Perio (TDI)	0.61 ± 1.04	0.90 ± 1.10	0.015
Furcation (TDI)	0.20 ± 0.40	0.51 ± 0.51	< 0.001
Root treatments	0.99 ± 1.58	3.31 ± 2.43	< 0.001
Satisfactory root treatments	0.38 ± 0.74	0.98 ± 1.05	< 0.001
No satisfactory root treatments	0.58 ± 1.16	2.33 ± 1.87	< 0.001
No. of missing teeth	1.59 ± 1.83	3.45 ± 4.55	0.001
No. of missing molars	0.69 ± 1.13	1.71 ± 1.90	< 0.001

Data is expressed as mean ± SD

*Significance adjusted with UNIANOVA for age, gender and smoking, NS p > 0.05

Significant results are given in bold (p ≤ 0.05)