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Table 2 Effects of locality size on Mexican adolescents' risk behaviors.

From: Socioeconomic status, urbanicity and risk behaviors in Mexican youth: an analysis of three cross-sectional surveys

Variable Ever smoked Smokes currently Drinks alcohol Sexual initiationc Use of condomd
Age (continuos variable) 1.15*** 1.28*** 1.21*** 1.65*** 0.97
  (1.13-1.17) (1.24-1.32) (1.18-1.24) (1.61-1.69) (0.92-1.02)
Gender (0 = Female; 1 = Male)      
Single 3.35*** 8.04*** 2.63***   6.21***
  (3.08-3.65) (6.69-9.65) (2.37-2.92) 0.87*** (5.02-7.68)
Married 6.90*** 16.36*** 8.00*** (0.79-0.95) 2.35***
  (5.69-8.36) (11.5-23.1) (6.46-9.90)   (1.84-3.00)
Marital status (0 = Single; 1 = Married)      
Female 0.82*** 0.54*** 0.51***   0.54***
  (0.71-0.94) (0.39-0.75) (0.43-0.60) N/A (0.43-0.69)
Male 1.69*** 1.11 1.54***   0.20***
  (1.43-2.00) (0.92-1.33 (1.30-1.83)   (0.16-0.26)
Locality sizeb according to SES:      
1st Quartile-SES (highest SES)      
Small semi-urban locality 0.41*** 0.72* 0.32*** 1.07 0.59*
  (0.29-0.58) (0.51-1.04) (0.22-0.45) (0.77-1.49) (0.34-1.01)
Large semi-urban locality 0.45*** 0.77 0.32*** 1.42** 0.45***
  (0.31-0.65) (0.51-1.17) (0.22-0.46) (1.01-1.98) (0.25-0.81)
Urban locality 0.34*** 0.58*** 0.26*** 1.14 0.74
  (0.24-0.49) (0.39-0.86) (0.18-0.37) (0.83-1.57) (0.44-1.24)
2nd Quartile-SES      
Small semi-urban locality 0.43*** 1.05 0.43*** 1.48** 0.79
  (0.31-0.58) (0.74-1.49) (0.31-0.60) (1.09-2.01) (0.44-1.42)
Large semi-urban locality 0.37*** 0.98 0.34*** 1.40** 0.82
  (0.26-0.53) (0.67-1.45) (0.24-0.49) (1.00-1.94) (0.44-1.54)
Urban locality 0.33*** 0.82 0.34*** 1.52** 1.11
  (0.23-0.47) (0.53-1.26) (0.24-0.49) (1.07-2.14) (0.62-1.98)
3rd Quartile-SES      
Small semi-urban locality 0.38*** 0.86 0.37*** 0.94 0.72
  (0.28-0.51) (0.58-1.26) (0.26-0.54) (0.70-1.26) (0.46-1.12)
Large semi-urban locality 0.37*** 0.73 0.38*** 0.85 0.70
  (0.26-0.53) (0.47-1.12) (0.26-0.55) (0.64-1.13) (0.45-1.08)
Urban locality 0.33*** 0.70 0.25*** 1.22 1.00
  (0.22-0.50) (0.46-1.07) (0.16-0.39) (0.92-1.63) (0.61-1.66)
4th Quartile-SES (low SES)      
Small semi-urban locality 0.41*** 0.66** 0.44*** 0.82 1.44*
  (0.28-0.59) (0.45-0.98) (0.30-0.65) (0.60-1.12) (0.99-2.11)
Large semi-urban locality 0.37*** 0.71 0.39*** 0.69** 1.88**
  (0.25-0.55) (0.47-1.07) (0.26-0.58) (0.51-0.94) (1.15-3.06)
Urban locality 0.57** 0.78 0.44*** 0.95 1.76**
  (0.36-0.90) (0.54-1.13) (0.27-0.71) (0.69-1.33) (1.06-2.90)
  n = 17,974 n = 17,974 n = 17,974 n = 17,974 n = 4,641
  1. Results are odds ratios (IC 95%).
  2. *p ≤ 0.1 **p ≤ 0.05 ***p ≤ 0.01.
  3. a = Analyses carried adjusting by primary sample unit. Multivariate model also includes educational level and survey year (2001 vs 2003). Two interaction terms included: marital status*gender and locality size*socioeconomic status (SES). OR for exposure categories in these variables are calculated with lincom command in Stata.
  4. b = Rural locality of: ≤ 2,500 inhabitants is the reference category comparing to small semi-urban locality: > 2,500 and ≤ 15,000; large semi-urban locality: > 15,000 and ≤ 100,000; and urban locality: > 100,000 inhabitants.
  5. c = Model without marital status*gender interaction term; result is OR for variable gender only.
  6. d = Among those who have initiated sexual activity.
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