Table 2.
Results from univariable Poisson regression analysis for the differences in the number of patients by various demographic and clinical factors
| Factor | IRR1 | 95% CI2 | P-value | Global test P-value |
|---|---|---|---|---|
| Day of the week | ||||
| Monday | 0.857 | (0.686–1.071) | 0.175 | <0.001 |
| Tuesday | 0.536 | (0.415–0.692) | <0.001 | |
| Wednesday* | 1 | |||
| Thursday | 0.435 | (0.330–0.572) | <0.001 | |
| Friday | 0.464 | (0.355–0.607) | <0.001 | |
| Month of study3 | ||||
| November 2011* | 1 | 0.365 | ||
| December 2011 | 1.041 | (0.746–1.452) | 0.813 | |
| January 2012 | 1.015 | (0.723–1.426) | 0.931 | |
| February 2012 | 0.982 | (0.709–1.359) | 0.912 | |
| March 2012 | 1.080 | (0.790–1.475) | 0.629 | |
| April 2012 | 1.406 | (0.988–2.001) | 0.058 | |
| May 2012 | 1.047 | (0.765–1.433) | 0.775 | |
| June 2012 | 0.727 | (0.415–1.274) | 0.266 | |
| Gender | ||||
| Male* | 1 | 0.098 | ||
| Female | 1.152 | (0.975–1.361) | 0.098 | |
| Age (years) | ||||
| 0–18 | 0.084 | (0.052–0.136) | <0.001 | <0.001 |
| 19–30 | 0.509 | (0.404–0.641) | <0.001 | |
| 31–50* | 1 | |||
| 51–65 | 0.612 | (0.493–0.761) | <0.001 | |
| 65+ | 0.369 | (0.285–0.478) | <0.001 | |
| Nationality | ||||
| Greek* | 1 | <0.001 | ||
| Immigrant | 0.418 | (0.348–0.502) | <0.001 | |
| Occupation | ||||
| Private sector* | 1 | <0.001 | ||
| Public sector | 0.390 | (0.259–0.587) | <0.001 | |
| Self-employed | 0.695 | (0.496–0.975) | 0.035 | |
| Unemployed | 2.134 | (1.642–2.774) | <0.001 | |
| On pension | 1.207 | (0.901–1.618) | 0.207 | |
| Housewife | 0.805 | (0.582–1.113) | 0.189 | |
| Pupil | 0.159 | (0.088–0.285) | <0.001 | |
| Student | 0.329 | (0.213–0.509) | <0.001 | |
| Reason for visiting | ||||
| Pain* | 1 | <0.001 | ||
| Other | 0.491 | (0.411–0.586) | <0.001 | |
| Type of emergency | ||||
| No pain associated* | 1 | <0.001 | ||
| Pain (endodontic + non-endodontic origin) | 0.005 | (0.001–0.037) | <0.001 | |
| Pain (endodontic origin) | 1.414 | (1.174–1.701) | <0.001 | |
| Pain (non-endodontic origin) | 0.476 | (0.371–0.612) | <0.001 | |
| Payment | ||||
| No – financial restraints | 0.150 | (0.112–0.201) | <0.001 | <0.001 |
| No – lack of co- operation | 0.138 | (0.102–0.187) | <0.001 | |
| No – referral* | 1 | |||
| Yes | 0.305 | (0.246–0.380) | <0.001 | |
| Treatment | ||||
| Anti-inflammatories | 0.165 | (0.092–0.296) | <0.001 | <0.001 |
| Anti-inflammatories/ Antibiotics | 0.051 | (0.019–0.138) | <0.001 | |
| Anti-inflammatories/ Antibiotics/Referral | 0.038 | (0.012–0.120) | <0.001 | |
| Anti-inflammatories/Referral | 0.051 | (0.019–0.138) | <0.001 | |
| Antibiotics | 0.101 | (0.049–0.210) | <0.001 | |
| Antibiotics/Referral | 0.127 | (0.066–0.244) | <0.001 | |
| Drainage | 0.494 | (0.336–0.724) | <0.001 | |
| Pulp extraction* | 1 | |||
| Referral | 4.975 | (3.907–6.335) | <0.001 | |
*
1Incidence rate ratio.
*
295% confidence interval.
*
3Results adjusted for number of operating days in each month.
Asterisk (*) defines reference category.