Table 3.
Risk ratios for the association of breast tumour stage at diagnosis with residential distance of breast cancer patients from Chris Hani Baragwanath Academic Hospital
| Distance to hospital (km) | Risk Ratio for late stage (III/IV) breast cancer | |||||
|---|---|---|---|---|---|---|
| Crude | Adjusted for age, race, referral source, year | Adjusted for age, race, referral source and socio-economic indicatorsa | ||||
| RR | 95% CI | RR | 95% CI | RR | 95% CI | |
| < 5 km | 1 | - | 1 | - | 1 | |
| 5 – 9.9 | 0.99 | 0.82, 1.19 | 0.98 | 0.82, 1.18 | 1.01 | 0.83, 1.23 |
| 10 – 19.9 | 1.06 | 0.88, 1.29 | 1.06 | 0.88, 1.28 | 1.08 | 0.88, 1.34 |
| 20 – 29.9 | 1.27 | 1.06, 1.53 | 1.31 | 1.08, 1.57 | 1.33 | 1.04, 1.68 |
| 30 – 39.9 | 1.39 | 1.11, 1.75 | 1.40 | 1.12, 1.75 | 1.33 | 0.93, 1.91 |
| 40 – 99 | 1.14 | 0.89, 1.46 | 1.17 | 0.92, 1.50 | - | |
| 100+ | 1.06 | 0.68, 1.67 | 1.12 | 0.71, 1.76 | - | |
| Trend per 30 kmb | 1.24 | 1.09, 1.41 | 1.25 | 1.09, 1.42 | 1.35 | 1.11, 1.65 |
Adjustment were carried out using continuous variables for age and year, and categories for race (black vs. non-black) and referral source (clinic, hospital, self, not known, GP).
a
Ward level socio-economic indicators restricted to patients residing in Soweto (number of patients n=634), Orange Farm/Sebokeng (n=145) and Katlehong (n=125).
b
Restricted to women residing within 50 km of CHBAH