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Table 5 Agreement between control indexes and proxies about frequency of surrogate consumption among 1564 control households with complete information for both respondents

From: Identifying the determinants of premature mortality in Russia: overcoming a methodological challenge

  Control
Control proxy Every day or more often Nearly every day 3–4 times per week Once or twice a week 1–3 times per month A few times per year Never or almost never Total
Every day or more often 2 0 1 2 1 1 0 7
Nearly every day 1 11 8 12 8 4 0 44
Three or four times a week 0 2 14 39 15 3 3 76
Once or twice a week 0 5 17 159 103 15 3 302
1–3 times a month 1 4 7 100 284 66 12 474
A few times per year 1 4 0 22 100 187 21 335
Never or almost never 0 3 1 8 13 32 269 326
Total 5 29 48 342 524 308 308 1,564
  1. Weighted Cohen's kappa coefficient for agreement between 1564 index-proxy pairs = 0.61