Table 6.

Means, proportions, and sibling correlations by income quintile of residence (Winnipeg)

	Quintile of residence
Outcomes	Q1	Q2	Q3	Q4	Q5
Continuous outcomes (mean)
Language arts index†	-0.49	-0.04	0.16	0.36	0.57
Health status (ADG morbidity score)	10.06	10.15	10.23	10.28	10.32
Hospital and physician costs	$1,231	$1,216	$1,184	$1,104	$1,140
Binary outcomes (Proportion)
Not in grade 12 at appropriate age†	.524	.298	.210	.132	.087
Teenage pregnancy†	.309	.197	.122	.081	.063
Received income assistance (age 18–19)†	.204	.104	.063	.024	.017
Sibling correlations
Continuous outcomes
Language arts index†	0.540 (0.457–0.623)	0.468 (0.395–0.541)	0.377 (0.311–0.443)	0.338 (0.286–0.390)	0.302 (0.252–0.352)
Health status (ADG morbidity score)	0.493 (0.411–0.575)	0.466 (0.393–0.539)	0.475 (0.407–0.543)	0.461 (0.408–0.514)	0.484 (0.430–0.538)
Hospital and physician costs†	0.372 (0.294–0.450)	0.357 (0.287–0.427)	0.294 (0.230–0.358)	0.305 (0.254–0.356)	0.285 (0.235–0.335)
Binary outcomes
Not in grade 12 at appropriate age†	0.672 (0.594–0.751)	0.544 (0.454–0.634)	0.471 (0.380–0.574)	0.391 (0.294–0.488)	0.285 (0.160–0.411)
Teenage pregnancy*	0.516 (0.365–0.667)	0.377 (0.217–0.537)	0.283 (0.086–0.479)	0.367 (0.187–0.548)	0.220 (0.000–0.458)
Received income assistance (age 18–19)	0.497 (0.383–0.612)	0.531 (0.404–0.658)	0.636 (0.512–0.760)	0.533 (0.357–0.708)	0.572 (0.383–0.761)
N (except as noted)	1,436	1,756	2,032	3,196	3,304

The N for “Teenage Pregnancy” ranged from 644 to 1,548 females.

Trend in continuous outcomes estimated by linear regression; in binary outcomes by Cochrane-Armitage test.

Trend in correlations estimated in PROC NLIMIXED.

*p for trend <0.05, ^†p for trend <0.01.