Table 3.

Mean annual changes in BMI between 2005 and 2009 by age, education level, baseline per capita Gross Domestic Product (GDP),and change in per capita GDP, for men and women: National Survey of Risk Factors for Noncommunicable Diseases, Argentina^*

	Men (n 31 217)		Women (n 39 088)
Interaction terms	Mean annual change	95% CI	Mean annual change	95% CI
Model 1: Age quintile (years)×time†
1 (18–25)	0·21	0·12, 0·30	0·27	0·16, 0·37
2 (26–34)	0·11	0·01, 0·21	0·21	0·12, 0·31
3 (35–46)	0·15	0·06, 0·23	0·25	0·15, 0·35
4 (47–59)	0·23	0·12, 0·34	0·11	−0·00, 0·22
5 (60–98)	0·06	−0·03, 0·14	0·13	0·03, 0·22
Model 2: Education×time‡
Primary incomplete	0·06	−0·08, 0·19	0·21	0·05, 0·37
Primary complete/secondary incomplete	0·16	0·08, 0·23	0·18	0·10, 0·27
Secondary complete/university or tertiary incomplete	0·17	0·11, 0·24	0·19	0·12, 0·26
University or tertiary complete	0·16	0·05, 0·27	0·19	0·10, 0·28
Model 3: Baseline per capita GDP×time§
Low	0·15	0·10, 0·20	0·17	0·12, 0·22
Medium	0·18	0·11, 0·25	0·22	0·14, 0·29
High	0·15	0·08, 0·21	0·21	0·13, 0·28
Model 4: Annual change in per capita GDP×time||
Low	0·12	0·07, 0·18	0·15	0·10, 0·20
Medium	0·18	0·12, 0·24	0·22	0·16, 0·29
High	0·21	0·12, 0·29	0·21	0·12, 0·30

^*Time interactions were added to each model separately. All models were adjusted for age, time, education level, time-varying per capita GDP and time-varying per capita GDP×education interaction, except for the baseline per capita GDP model, which used baseline per capita GDP instead of time-varying per capita GDP.

^† P for age×time interaction=0·07 and 0·10 for men and women, respectively. P for linear trend across age quintiles=0·15 and 0·01 for men and women, respectively. Age was categorized for this model only.

^‡ P for education×time interaction=0·49 and 0·99 for men and women, respectively.

^§ P for baseline per capita GDP×time interaction=0·66 and 0·51 for men and women, respectively.

^|| P for change in per capita GDP×time interaction=0·19 and 0·18 for men and women, respectively.