Table 3.
The effect of clinical and sociodemographic factors on number of outpatient visits (univariable and multivariable regression analysis) analysed for the Stockholm population, n = 845
| Negative binomial regression | Preoperative visits (univariable) | Preoperative visits (multivariable) | Postoperative visits (univariable) | Postoperative visits (multivariable) | ||||
|---|---|---|---|---|---|---|---|---|
| IRR | p value | IRR | p value | IRR | p value | IRR | p value | |
| Age category (ref: 18–39) | ||||||||
| 40–59 | 1.53 (1.15–2.05) | 0.004 | 1.40 (1.06–1.84) | 0.016 | 1.08 (0.86–1.36) | 0.487 | 1.03 (0.81–1.31) | 0.814 |
| 60–69 | 2.31 (1.72–3.09) | < 0.001 | 1.82 (1.37–2.41) | < 0.001 | 1.27 (1.00-1.62) | 0.052 | 1.17 (0.89–1.52) | 0.256 |
| 70– | 3.12 (2.25–4.32) | < 0.001 | 2.12 (1.52–2.96) | < 0.001 | 1.13 (0.80–1.58) | 0.493 | 1.07 (0.74–1.54) | 0.718 |
| Year of diagnosis (ref: 01/04) | ||||||||
| 05/07 | 1.04 (0.82–1.33) | 0.748 | 0.93 (0.75–1.17) | 0.556 | 1.28 (1.02–1.61) | 0.035 | 1.28 (1.00-1.63) | 0.049 |
| 08/10 | 0.85 (0.68–1.07) | 0.165 | 0.77 (0.62–0.95) | 0.015 | 1.25 (1.00-1.55) | 0.051 | 1.27 (1.00-1.61) | 0.046 |
| 11/13 | 0.94 (0.75–1.18) | 0.584 | 0.74 (0.60–0.92) | 0.007 | 1.46 (1.17–1.82) | 0.001 | 1.53 (1.20–1.95) | 0.001 |
| Sex | ||||||||
| Male | 2.67 (2.30–3.10) | < 0.001 | 0.99 (0.84–1.15) | 0.86 | 1.08 (0.92–1.27) | 0.361 | 1.29 (1.08–1.53) | 0.004 |
| Comorbidity | 0.80 (0.64-1.00) | 0.046 | 2.41 (2.05–2.84) | < 0.001 | 0.99 (0.78–1.25) | 0.906 | 1.02 (0.86–1.20) | 0.846 |
| Educational level (ref: elementary) | ||||||||
| High school diploma | 0.57 (0.46–0.72) | < 0.001 | 0.96 (0.78–1.19) | 0.708 | 0.99 (0.79–1.26) | 0.964 | 1.01 (0.79–1.28) | 0.964 |
| University degree | 0.76 (0.63–0.92) | 0.004 | 0.83 (0.67–1.04) | 0.114 | 1.00 (0.83–1.20) | 0.968 | 1.06 (0.83–1.36) | 0.657 |
| Income level (ref: low) | ||||||||
| Medium | 0.78 (0.64–0.93) | 0.007 | 0.86 (0.72–1.03) | 0.097 | 1.02 (0.85–1.23) | 0.831 | 0.93 (0.76–1.12) | 0.437 |
| High | 0.64 (0.51–0.80) | < 0.001 | 0.81 (0.65–1.02) | 0.071 | 1.03 (0.82–1.29) | 0.803 | 0.83 (0.65–1.06) | 0.136 |
| Country of birth (ref:Sweden) | ||||||||
| Born in Europe (not Sweden) | 1.35 (1.06–1.73) | 0.015 | 1.25 (0.99–1.58) | 0.065 | 1.28 (0.98–1.67) | 0.069 | 1.40 (1.07–1.83) | 0.014 |
| Born outside Europe | 1.02 (0.72–1.43) | 0.93 | 1.08 (0.77–1.53) | 0.647 | 0.95 (0.68–1.34) | 0.77 | 0.93 (0.64–1.34) | 0.681 |
| Grade IV (ref: grade III) | ||||||||
| Grade IV | 0.00 (0.00–0.00) | 0.078 | 1.08 (0.86–1.35) | 0.516 | 1.22 (0.99–1.51) | 0.067 | 1.10 (0.88–1.39) | 0.399 |
Bold values indicate the p value ≤ 0.05
The analysis of preoperative visits (1 year before diagnosis) include all 845 in the subpopulation but the postoperative visits include only the 454 patients alive after 1 year
*IRR = incidence rate ratio
**Any comorbidity (any comorbidity or no comorbidity according to the Elixhauser definition)