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. 2014 Oct 23;14:1097. doi: 10.1186/1471-2458-14-1097

Table 3.

Bivariate associations between outcomes and the independent variables according to the levels

Treatment needs
Restorative Extraction Prosthesis
n % (CI 95%) PR (CI 95%) % (CI 95%) PR (CI 95%) % (CI 95%) PR (CI 95%)
Individual level
Household Income
5 and more MW 1,441 38.0 (35.4;40.5) Ref 5.8 (4.5;7.0) Ref 47.0 (44.4;49.5) Ref
3 to 5 MW 1,805 51.4 (49.0;53.7) 1.35 (1.25;1.46) 11.4 (9.9;12.8) 1.97 (1.54;2.51) 67.8 (65.6;69.9) 1.44 (1.35;1.53)
1 to 3 MW 4,687 62.7 (61.3;64.0) 1.65 (1.54;1.76) 18.9 (17.7;20.0) 3.27 (2.63;4.08) 79.9 (78.7;81.0) 1.70 (1.60;1.80)
Up to 1 MW 1,404 70.6 (68.2;72.9) 1.85 (1.72;2.00) 25.4 (23.1;27.6) 4.40 (3.52;5.55) 84.5 (82.6;86.3) 1.79 (1.69;1.90)
Education (years of schooling)
12 and more 2,226 43.6 (41.5;45.6) Ref 8.4 (7.2;9.5) Ref 54.0 (51.9;56) Ref
9 to 11 2,963 57.0 (55.2;58.7) 1.30 (1.23;1.38) 13.7 (12.4;14.9) 1.63 (1.38;1.92) 73.7 (72.1;75.2) 1.36 (1.30;1.42)
6 to 8 1,961 64.6 (62.4;66.7) 1.48 (1.39;1.56) 19.6 (17.8;21.3) 2.34 (1.98;2.76) 80.6 (78.8;82.3) 1.49 (1.42;1.56)
Up to 5 2,345 66.6 (64.6;68.5) 1.52 (1.44;1.61) 24.9 (23.1;26.6) 2.97 (2.55;3.48) 84.9 (83.4;86.3) 1.57 (1.50;1.64)
Sex
Male 3,277 61.2 (59.5;62.8) Ref 18.2 (16.8;19.5) Ref 72.7 (71.1;74.2) Ref
Female 6,287 56.1 (54.8;57.3) 0.91 (0.88;0.95) 15.5 (14.6;16.3) 0.85 (0.77;0.93) 73.6 (72.5;74.6) 1.01 (0.98;1.03)
Race (Skin colour)
White 4,049 50.2 (48.6;51.7) Ref 12.6 (11.5;13.6) Ref 64.4 (62.9;65.8) Ref
Black or Mixed 5,282 63.4 (62.1;64.6) 1.26 (1.21;1.31) 19.2 (18.1;20.2) 1.52 (1.38;1.68) 80.0 (78.9;81.0) 1.24 (1.21;1.27)
Neighbourhood level
Socioeconomic Index
3rd Tertile (Better-off) 3,163 48.9 (47.1;50.6) Ref 12.2 (11;13.3) Ref 62.4 (60.7;64.0) Ref
2nd Tertile 3,143 61.3 (59.5;63.0) 1.25 (1.20;1.31) 17.3 (15.9;18.6) 1.42 (1.26;1.60) 78.0 (76.5;79.4) 1.25 (1.21;1.29)
1st Tertile (Worst) 3,173 63.8 (62.1;65.4) 1.30 (1.25;1.36) 19.8 (18.4;21.1) 1.62 (1.44;1.83) 79.7 (78.2;81.1) 1.28 (1.24;1.32)
City Level
Human Development Index
0.79 and more (Better-off) 3,075 48.5 (46.7;50.2) Ref 13.6 (12.3;14.8) Ref 64.6 (62.9;66.2) Ref
0.74 to 0.78 2,867 59.9 (58.1;61.6) 1.23 (1.18;1.29) 18.3 (16.8;19.7) 1.34 (1.19;1.51) 75.6 (74.0;77.1) 1.17 (1.13;1.21)
Up to 0.74 (Worst) 3,622 64.2 (62.6;65.7) 1.32 (1.27;1.38) 17.3 (16.0;18.5) 1.27 (1.13;1.42) 78.8 (77.4;80.1) 1.22 (1.18;1.26)
Oral Health Services in Primary Care
3rd Tertile (Better-off) 3,099 57.4 (55.6;59.1) Ref 15.9 (14.6;17.1) Ref 73.6 (72.0;75.1) Ref
2nd Tertile 2,988 57.9 (56.1;59.6) 1.01 (0.97;1.05) 16.1 (14.7;17.4) 1.01 (0.9;1.14) 73.3 (71.7;74.8) 1.00 (0.97;1.03)
1st Tertile (Worst) 3,212 58.5 (56.7;60.2) 1.02 (0.98;1.06) 17.2 (15.8;18.5) 1.08 (0.97;1.21) 73.7 (72.1;75.2) 1.00 (0.97;1.03)
Oral Health Services in Secondary Care
3rd Tertile (Better-off) 3,188 53.3 (51.5;55.0) Ref 15.8 (14.5;17.0) Ref 72.1 (70.5;73.6) Ref
2nd Tertile 2,893 62.5 (60.7;64.2) 1.17 (1.12;1.22) 18.0 (16.6;19.3) 1.14 (1.02;1.28) 73.1 (71.4;74.7) 1.01 (0.98;1.04)
1st Tertile (Worst) 3,483 58.2 (56.5;59.8) 1.09 (1.05;1.14) 15.7 (14.4;16.9) 0.99 (0.89;1.11) 74.6 (73.1;76.0) 1.03 (1.00;1.06)

MW = Minimum Wage; CI = Confidence Interval; PR = Prevalence Ratio.