Experimental | Control | χ2 Statistic | P Value | Intracluster Correlation Coefficient | Adjusted χ2 Statistic | Adjusted P Value | |
---|---|---|---|---|---|---|---|
Study details | |||||||
No. of GP offices | 12 | 12 | |||||
No. of study participants | 352 | 412 | |||||
Loss to follow-up | |||||||
GP offices | 0 (0) | 0 (0) | N/A | N/A | N/A | N/A | N/A |
Study participants | 130 (36.9) | 91 (22.1) | 20.346 | <.001 | 0.214 | 2.354 | .125 |
Improvement in oral health–related QoLa | n = 162b | n = 243b | |||||
Functional limitation | 22 (13.6) | 24 (9.9) | 1.324 | .25 | –0.008c | 1.324 | .25 |
Physical pain | 45 (27.8) | 53 (21.8) | 1.887 | .17 | –0.006c | 1.887 | .17 |
Psychologic discomfort | 27 (16.7) | 26 (10.7) | 3.043 | .081 | 0.031 | 1.924 | .165 |
Physical disability | 15 (9.3) | 17 (7.0) | 0.684 | .408 | 0.035 | 0.412 | .521 |
Psychologic disability | 25 (15.4) | 21 (8.6) | 4.451 | .035 | 0.023 | 3.106 | .078 |
Social disability | 7 (4.3) | 8 (3.3) | 0.289 | .591 | 0.011 | 0.240 | .624 |
Handicap | 17 (10.5) | 12 (4.9) | 4.513 | .034 | 0.014 | 3.591 | .058 |
OHIP-NL14 total score | 57 (35.2) | 63 (25.9) | 3.997 | .046 | 0.002 | 3.857 | .049 |
Improvement in self-reported oral health complaints | n = 222b | n = 321b | |||||
Pain in mouth | 33 (14.9) | 28 (8.7) | 4.965 | .026 | 0.017 | 3.451 | .063 |
Dry mouth | 38 (17.1) | 59 (18.4) | 0.143 | .705 | 0.019 | 0.095 | .758 |
Bad breath | 19 (8.6) | 19 (5.9) | 1.405 | .236 | –0.018c | 1.405 | .236 |
Any | 78 (35.1) | 89 (27.7) | 3.383 | .066 | 0.036 | 1.750 | .186 |
GP = general practitioner; N/A = not applicable because GP office is cluster level itself; OHIP-NL14 = 14-item Oral Health Impact Profile; QoL = quality of life.
Note: Data in Experimental and Control columns for rows Loss to follow-up and below are presented as n (%).
↵a Subdomains according to Slade.21
↵b No. of patients with a completed baseline and follow-up questionnaire.
↵c To calculate adjusted χ2 statistics, negative intracluster correlation coefficients were set to 0 for these variables.30,31