Significant increment in the prevalence of overweight and obesity documented between 1994 and 2008 in Mexican college students

Figures & data

Table 1 Clinical and biochemical characteristics of the 4606 Mexican students recruited in this study

Men		Year
		1994	1997	1998	1999	2008	Total	P *
Lean	n (%)	221	150	473	386	293	1523	–
	Age (mean ± SD)	17.6 ± 1.5	18.3 ± 0.8	17.3 ± 1.5	17.3 ± 1.5	18.2 ± 0.7	17.6 ± 1.4	NS
	Weight (Kg)	61.6 ± 8.7	63.0 ± 7.9	61.3 ± 7.9	62.1 ± 7.9	63.4 ± 7.7	62.1 ± 8.0	NS
	Height (cm)	1.70 ± 0.07	1.72 ± 0.06	1.70 ± 0.07	1.71 ± 0.06	1.71 ± 0.06	1.71 ± 0.06	NS
	BMI (Kg/m^2)	21.0 ± 2.1	21.1 ± 2.0	21.0 ± 2.1	21.1 ± 2.1	21.4 ± 1.9	21.1 ± 2.1	NS
	WC (cm)	76.4 ± 6.7	76.3 ± 5.9	75.7 ± 6.6	76.4 ± 6.5	78.0 ± 6.2	76.5 ± 6.5	NS
	Glucose (mmol/l)	4.9 ± 0.59	5.1 ± 0.6	5.0 ± 0.5	4.9 ± 0.5	4.9 ± 0.3	5.0 ± 0.5	NS
OW/OB	n (%)	58	58	106	117	129	468	–
	Age (mean ± SD)	17.7 ± 1.4	18.3 ± 1.0	17.6 ± 1.6	17.5 ± 1.3	18.2 ± 0.8	17.8 ± 1.3	NS
	Weight (Kg)	81.0 ± 11.4	81.7 ± 9.7	82.1 ± 12.5	83.8 ± 10.3	84.1 ± 11.2	83.4 ± 11.1	<0.001
	Height (cm)	1.70 ± 0.07	1.74 ± 0.06	1.70 ± 0.07	1.72 ± 0.06	1.71 ± 0.05	1.71 ± 0.06	NS
	BMI (Kg/m^2)	27.7 ± 2.5	27.3 ± 2.0	28.2 ± 3.5	27.7 ± 2.4	28.7 ± 3.4	28.0 ± 3.0	0.001
	WC (cm)	89.4 ± 8.7	90.1 ± 8.7	91.3 ± 11.3	91.8 ± 9.5	94.3 ± 9.6	91.7 ± 9.9	<0.001
	Glucose (mmol/l)	5.0 ± 0.4	5.1 ± 0.4	5.2 ± 0.4	5.0 ± 0.4	5.0 ± 0.5	5.1 ± 0.4	NS
Women
Lean	n (%)	307	264	420	538	518	2047	–
	Age (mean ± SD)	18.2 ± 1.5	18.1 ± 0.75	18.0 ± 1.0	17.9 ± 1.3	18.0 ± 0.6	17.8 ± 1.1	NS
	Weight (Kg)	53.1 ± 6.4	53.5 ± 6.6	54.1 ± 6.6	54.1 ± 6.3	53.4 ± 6.2	53.7 ± 6.4	NS
	Height (cm)	1.57 ± 0.06	1.59 ± 0.06	1.59 ± 0.06	1.58 ± 0.06	1.58 ± 0.05	1.58 ± 0.06	NS
	BMI (Kg/m^2)	21.3 ± 2.1	21.0 ± 2.1	21.2 ± 2.0	21.5 ± 1.9	21.3 ± 2.0	21.3 ± 2.0	NS
	WC (cm)	69.9 ± 5.6	69.4 ± 6.3	70.6 ± 6.3	72.0 ± 6.4	73.2 ± 6.1	71.4 ± 6.3	NS
	Glucose (mmol/l)	4.8 ± 0.6	4.9 ± 0.5	5.0 ± 0.4	4.6 ± 0.5	4.7 ± 0.4	4.8 ± 0.5	NS
OW/OB	n (%)	79	64	92	162	171	568	–
	Age (mean ± SD)	17.8 ± 1.5	18.0 ± 0.6	18.0 ± 0.8	17.7 ± 1.2	18.1 ± 0.6	17.8 ± 1.1	NS
	Weight (Kg)	68.5 ± 8.4	70.2 ± 6.5	72.7 ± 9.9	71.0 ± 9.3	71.7 ± 11.8	71.0 ± 9.9	0.03
	Height (cm)	1.57 ± 0.06	1.59 ± 0.06	1.60 ± 0.07	1.59 ± 0.06	1.58 ± 0.06	1.59 ± 0.06	NS
	BMI (Kg/m^2)	27.6 ± 2.4	27.5 ± 2.0	28.3 ± 3.0	28.9 ± 3.1	29.0 ± 3.7	28.6 ± 3.1	0.001
	WC (cm)	82.2 ± 7.1	82.0 ± 6.5	83.8 ± 8.6	84.1 ± 8.4	88.3 ± 9.2	84.8 ± 8.6	<0.001
	Glucose (mmol/l)	5.1 ± 1.3	5.0 ± 1.4	5.0 ± 0.4	4.7 ± 0.5	4.9 ± 0.8	4.9 ± 0.8	NS

* Note: P values from a one-way ANOVA.

Abbreviations: OW, overweight; OB, obese; BMI, body mass index; WC, waist circumference; NS, not significant.

Table 2 Weight, BMI, and waist circumference values in the population studied (n = 4606) between 1994 and 2008

Year	Age (years)	Weight (kg)	BMI (kg/m^2)	WC (cm)	Glucose (mmol/l)
1994	17.9 ± 1.3	60.2 ± 11.5	22.5 ± 3.4	75.1 ± 9.1	4.9 ± 0.7
1997	18.2 ± 0.8	61.4 ± 12.2	22.5 ± 3.4	75.4 ± 9.4	5.0 ± 0.7
1998	17.7 ± 1.3	61.5 ± 11.8	22.4 ± 3.6	75.9 ± 9.6	5.0 ± 0.4
1999	17.5 ± 1.3	61.7 ± 11.8	22.8 ± 3.5	77.0 ± 9.4	4.9 ± 0.5
2008	17.1 ± 0.71	62.4 ± 13.2	23.3 ± 4.0	79.2 ± 10.3	4.9 ± 0.53
Total	17.7 ± 1.2	61.6 ± 12.2	22.7 ± 3.6	76.8 ± 9.8	4.9 ± 0.5
P value	NS	P < 0.0001	P < 0.0001	P < 0.0001	NS

Notes: Data expressed in mean ± standard deviation. P value is obtained from one way ANOVA for the change of each variable through years.

Abbreviations: BMI, body mass index; WC, waist circumference; NS, not significant.

Figure 1 Mean weight A, BMI B and waist circumference C of the men (gray) and women (white) studied between 1994 and 2008.

Error bars represent CI 95%. Women: weight 1994 vs 1999 (P = 0.03) and 2008 (P = 0.05); BMI 1997 (P = 0.006), 1998 (P = 0.04) and 1999 (P = 0.01) vs 2008; and waist circumference 1994 throughout 2008 all P < 0.0001. Men: weight 1994 (P < 0.001), 1998 (P < 0.001) and 1999 (P = 0.009) vs 2008; BMI and waist circumference 1994 throughout 2008 (all P < 0.001) (except weight 1997 vs 2008, P = 0.07).

Figure 2 Prevalence of overweight and obesity in men (gray) and women (white) between 1994 and 2008.