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Table 2 Association between meteorological factors and incidence rate of childhood clinic visits for diarrhea, Peru, 2005–2015

From: Meteorological factors and childhood diarrhea in Peru, 2005–2015: a time series analysis of historic associations, with implications for climate change


IRR (95% CI)

Temperature across 3 weeks prior to diarrhea casesa

1.038 (1.032, 1.044)

 1-week temperature lagb

1.014 (1.011, 1.017)

 2-week temperature lagb

1.016 (1.013, 1.019)

 3-week temperature lagb

1.008 (1.005, 1.010)

Moderate/strong El Niño period

1.026 (1.009, 1.044)

Dry season

1.014 (1.002, 1.027)

Rotavirus vaccine era (2010–2015)c

0.913 (0.886, 0.941)

Year (secular trend)d

0.968 (0.961, 0.974)

  1. IRR incidence rate ratio, CI confidence interval
  2. Multivariable model: IRRs are controlled for other variables in the model/table, and for province. This model also included terms for the interaction between the rotavirus vaccine era and temperature variables; the overall interaction was not significant (p = 0.37), thus the temperature estimates stratified by vaccine era are not presented.
  3. a Combined effect of temperature across 3 weeks prior to weekly diarrhea report.
  4. b The 1-week temperature lag is the effect of temperature in the week before the diarrhea cases, the 2-week lag refers to the week before that, etc.
  5. c Compared to the pre-rotavirus vaccine era (2005–2009).
  6. d Continuous term for year.