Table 4.

Difference in days for rural patients (urban reference group) stratified by private health insurance status at 50th, 75th, and 90th interval percentiles

Colorectal cancerBreast cancer
50th75th90th50th75th90th
nDays diff. (95% CI)Days diff. (95% CI)Days diff. (95% CI)nDays diff. (95% CI)Days diff. (95% CI)Days diff. (95% CI)
Symptomatic
 Patient intervalNo PHI13824 (344)16 (−16–49)−1 (−11–9)900 (−2–3)3 (−20–25)197 (−200 to −194)
PHI1641 (−10–12)6 (−11 to −1)13 (−18 to −8)164−3 (−17–11)23 (−42 to −4)48 (−52 to −45)
 Primary care intervalNo PHI788 (312)42 (3748)58 (5065)556 (48)11 (914)39 (672)
PHI107−2 (−7–4)−1 (−5–2)4 (0–9)1192 (−2–6)1 (−2–5)−3 (−14–9)
 Diagnostic intervalNo PHI13510 (−40–59)30 (2337)54 (2187)893 (0–7)−4 (−18–9)29 (2434)
PHI172−3 (−5–0)−5 (−11–2)18 (1422)167−2 (−5–0)0 (−7–8)−5 (−10–1)
 Treatment intervalNo PHI150−2 (−15–12)1 (−15–17)5 (0–10)854 (−7 to −1)5 (−8 to −1)−4 (−7–0)
PHI1740 (−6–5)6 (211)16 (1023)1676 (−4 to 15)7 (311)7 (−1–15)
 Health system intervalNo PHI1317 (212)43 (3651)113 (92135)850 (−4–4)3 (−7–12)5 (0–9)
PHI1667 (−4–18)3 (−6–11)25 (1634)1673 (−3–9)2 (−15–19)4 (08)
 Total intervalNo PHI11910 (614)42 (3549)68 (6076)8211 (−1–22)62 (−84 to −41)76 (−87 to −65)
PHI14325 (941)42 (3054)4 (−2–11)157−3 (−16–10)−13 (−26–0)68 (5284)
Symptomatic and screen-detected
 Diagnostic intervalNo PHI1563 (−7–12)22 (−3–47)31 (458)1581 (−4–6)3 (−1–7)32 (2342)
PHI2135 (−12–21)−4 (−43–35)32 (2638)293−1 (−4–1)−4 (−27–19)7 (−11 to −3)
 Treatment intervalNo PHI177−4 (−18–11)−1 (−6–3)10 (−7–27)160−4 (−8–1)−4 (−10–2)−1 (−8–5)
PHI2382 (0–5)8 (511)14 (324)3186 (39)6 (210)4 (−78–86)
 Total intervalNo PHI1381 (−10–11)20 (1228)106 (103110)1493 (−8–14)1 (−10–13)146 (−154 to −137)
PHI18314 (127)54 (3871)21 (−1–42)281−1 (−8–6)−6 (−15–2)14 (−17–45)
  • NOTE: Quantile regression marginal effects are calculated at the mean of age and mode for sex (colorectal only) and socioeconomic status. Bold indicates P < 0.05.

  • Abbreviations: Diff., difference; PHI, private health insurance.