Table 3.

Risk of medical and pharmacy costs (US$) above the 50th, 75th and 90th percentiles according to BMI weight classification, sex and age

	Medical						Pharmacy
	50th percentile Above vs below		75th percentile Above vs below		90th percentile Above vs below		50th percentile Above vs below		75th percentile Above vs below		90th percentile Above vs below
	Risk ratio	95% CI	Risk ratio	95% CI	Risk ratio	95% CI	Risk ratio	95% CI	Risk ratio	95% CI	Risk ratio	95% CI
Sex
Men	1.00		1.00		1.00		1.00		1.00		1.00
Women	1.43	1.36 to 1.51	1.47	1.35 to 1.60	1.42	1.24 to 1.64	1.58	1.50 to 1.66	1.59	1.46 to 1.74	1.14	1.00 to 1.29
Age groups
18–39	1.00		1.00		1.00		1.00		1.00		1.00
40–49	1.16	1.08 to 1.23	1.15	1.03 to 1.29	1.08	0.90 to 1.28	1.14	1.07 to 1.22	1.45	1.29 to 1.64	1.72	1.37 to 2.15
50–59	1.50	1.42 to 1.59	1.65	1.50 to 1.82	1.36	1.16 to 1.58	1.48	1.39 to 1.56	2.28	2.05 to 2.55	2.82	2.30 to 3.46
60+	1.61	1.52 to 1.72	1.83	1.64 to 2.04	1.33	1.11 to 1.60	1.57	1.48 to 1.68	2.57	2.29 to 2.89	3.78	3.06 to 4.68
BMI (kg/m2)
Underweight	1.05	0.88 to 1.26	0.91	0.64 to 1.31	0.61	0.28 to 1.35	2.05	1.25 to 3.34	1.05	0.74 to 1.48	2.05	1.25 to 3.34
Normal weight	1.00		1.00		1.00		1.00		1.00		1.00
Overweight	0.95	0.90 to 1.00	0.95	0.86 to 1.05	1.01	0.85 to 1.20	1.01	0.95 to 1.06	1.18	1.07 to 1.30	1.68	1.41 to 2.00
Obese	1.00	0.95 to 1.06	1.14	1.03 to 1.25	1.21	1.01 to 1.43	1.11	1.05 to 1.17	1.19	1.08 to 1.31	1.76	1.47 to 2.12
Morbidly obese	1.18	1.08 to 1.29	1.62	1.40 to 1.87	2.18	1.72 to 2.77	1.13	1.03 to 1.25	1.30	1.09 to 1.55	1.93	1.43 to 2.61

Shaded cells represent statistical significance at the 0.05 level.

BMI, body mass index.