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Table 4 Multilevel logistic regression models for province-level variables interaction effects on mental disabilitya

From: Effect modification of social-context changes on mental disability in China from 1987 to 2006: a multi-level study of 1.9 million people

  Per capita gross domestic product, OR (95% CI)
High Medium Low P trend
1987
Male
 Number of health professional in per 1,000 people
  High Reference 0.84 (0.57-1.11) 0.96 (0.53-1.39) 0.86
  Medium 0.69 (0.40-0.99) 1.31 (0.59-2.03) 0.63 (0.34-0.93) 0.98
  Low 1.20 (0.53-1.86) 1.20 (0.77-1.63) 1.03 (0.72-1.35) 0.37
Female
 Number of health professional in per 1,000 people
  High Reference 0.89 (0.59-1.20) 1.33 (0.70-1.95) 0.42
  Medium 0.64 (0.35-0.94) 0.87 (0.35-1.39) 0.82 (0.43-1.21) 0.43
  Low 0.62 (0.24-0.99) 0.88 (0.54-1.23) 1.09 (0.73-1.46) 0.01
2006
Male
 Number of health professional in per 1,000 people
  High Reference 0.92 (0.63-1.20) NA NA
  Medium 1.01 (0.71-1.49) 1.03 (0.76-1.30) 0.72 (0.47-0.97) 0.16
  Low 1.11 (0.58-1.64) 1.15 (0.74-1.55) 1.21 (0.93-1.49) 0.57
Female
 Number of health professional in per 1,000 people
  High Reference 1.03 (0.71-1.35) NA NA
  Medium 1.09 (0.71-1.47) 1.02 (0.76-1.29) 0.77 (0.51-1.04) 0.20
  Low 0.60 (0.31-0.89) 1.46 (0.95-1.97) 1.08 (0.83-1.33) 0.33
  1. Abbreviations: CI confidence interval, OR odds ratio, NA not available
  2. a adjustment for individual-level variable