Table 2

Multivariable quantile regression for delay intervals of interest with patient and disease characteristics

CharacteristicOverall intervalOverall intervalOverall interval
Doctor intervalSystem intervalDiagnostic intervalTreatment interval
Median difference (N=4982)P-valueMedian difference (N=5113)P-valueMedian difference (N=4926)P-valueMedian difference (N=5174)P-valueMedian difference (N=4982)P-value
Age (increase in 5 years)−3
(−6.5 to 0.5)		0.0980
(−0.3 to 0.4)		0.969−0.7
(−3 to 1.6)		0.536−3.5
(−6.4 to −0.6)		0.0172
(1.4 to 2.5)		<0.001
Sex
 MaleRefRefRefRefRef
 Female26.5
(18.9 to 34.2)		<0.0010.7
(−0.2 to 1.7)		0.13820.2
(14.6 to 25.8)		<0.00127.2
(20.2 to 34.3)		<0.0011.6
(0.3 to 3)		0.021
ON−Marg Summary Score (increase in one point)3.7
(−0.7 to 8.1)		0.096−0.3
(−0.7 to 0.2)		0.213
(−0.7 to 6.7)		0.1155
(0.6 to 9.4)		0.024−0.1
(−1.1 to 0.9)		0.873
Disease site
 Proximal colonRefRefRefRefRef
 Sigmoid and rectosigmoid14.3
(5.6 to 23)		0.0011.4
(0.3 to 2.5)		0.0168.5
(1.6 to 15.4)		0.0155.4
(−2.5 to 13.4)		0.188.3
(6.5 to 10.2)		<0.001
 Rectum22.1
(13.2 to 30.9)		<0.0014.9
(3.6 to 6.3)		<0.00113.1
(6.3 to 19.8)		<0.0015.5
(−2.6 to 13.5)		0.18419.6
(17.9 to 21.4)		<0.001
Stage
 IRefRefRefRefRef
 II−34.3
(−48.1 to −20.4)		<0.001−7.3
(−9.1 to −5.4)		<0.001−30
(−39.4 to −20.5)		<0.001−26.1
(−38.6 to −13.5)		<0.001−11.1
(−13.9 to −8.2)		<0.001
 III−41.7
(−54.1 to −29.3)		<0.001−5.9
(−8 to −3.9)		<0.001−30.7
(−39.6 to −21.9)		<0.001−35.2
(−45.7 to −24.7)		<0.001−12.6
(−15.2 to −10)		<0.001
 IV−61.3
(−72.5 to −50.2)		<0.001−7.8
(−9.3 to −6.3)		<0.001−45.7
(−54.6 to −36.8)		<0.001−54.6
(−65.7 to −43.5)		<0.001−15
(−17.6 to −12.5)		<0.001
Use of lower GI endoscopy in patient LHIN (increase in 1000 procedures per 100 000 residents per year)−7.6
(−13.8 to −1.4)		0.0170.4
(−0.4 to 1.2)		0.328−7.6
(−13.1 to −2.1)		0.007−7.3
(−14.3 to −0.3)		0.041−1
(−2.5 to 0.5)		0.172
Year of diagnosis (increase in 1 year)0.3
(−1 to 1.6)		0.629−0.2
(−0.3 to 0)		0.0460.7
(−0.3 to 1.8)		0.159−0.2
(−1.6 to 1.1)		0.7230.6
(0.3 to 0.9)		<0.001

  • Effect estimates are presented as median days with 95% CIs.

  • Models are adjusted for age, sex, ON-Marg score, disease site, access to lower endoscopy, year of diagnosis, density of specialists and stage (diagnoses in 2007 and later).

  • GI, gastrointestinal; LHIN, local health integration network.