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Table 2 Overall and subgroup incidences of ADI

From: Incidence of acute diarrheal illness in Chinese communities: a meta-analysis

Variable Cases/Total (No. of studies) Pooled prevalence prior to 2-week period (%) 95%CI of prevalence (%) Annual incidence per person-yeara 95%CI of incidence per person-year Q-value (p-value)
Overall 20,134/911240 (n = 35) 2.04 1.48–2.79 0.53 0.38–0.73 15,062.69 (0.000)
Gender
 Male 3428/196522 (n = 15) 2.22 1.30–3.77 0.58 0.34–0.98 3382.42 (0.000)
 Female 3234/202362 (n = 15) 2.00 1.18–3.37 0.52 0.31–0.88 3074.44 (0.000)
Age group (year)
 0–4 3832/43463 (16) 5.51 3.76–8.01 1.43 0.98–2.08 1562.38 (< 0.0001)
 5–14 3095/103720 (16) 2.10 1.38–3.18 0.55 0.36–0.83 1570.99 (< 0.0001)
 ≥15 10,325/496007 (16) 2.01 1.28–3.14 0.52 0.33–0.82 1808.43 (< 0.0001)
Time period
 1980–1989 12,142/243664 (n = 11) 3.17 2.23–4.49 0.82 0.60–1.27 2378.81 (0.000)
 1990–1999 1524/94874 (n = 3) 1.89 0.86–4.13 0.49 0.22–1.07 476.52 (0.000)
 2000–2012 6066/506591 (n = 19) 1.84 1.34–2.53 0.48 0.35–0.66 2596.51 (0.000)
Study area
 Urban 2510/267115 (n = 14) 1.28 0.80–2.06 0.33 0.21–0.54 1740.58 (0.000)
 Rural 9445/486495 (n = 27) 1.94 1.38–2.72 0.50 0.36–0.71 6937.73 (0.000)
 East 4800/415033 (n = 20) 1.48 1.11–1.97 0.38 0.29–0.51 1761.12 (0.000)
 Central 2704/109382 (n = 4) 1.85 0.75–4.46 0.48 0.20–1.16 1054.45 (0.000)
 West 4616/248613 (n = 11) 2.64 1.32–5.22 0.69 0.34–1.36 5396.89 (0.000)
 South 7107/580306 (n = 25) 1.61 1.18–2.21 0.42 0.47–0.55 4179.49 (0.000)
 North 5013/192722 (n = 10) 2.52 1.37–4.58 0.66 0.36–1.19 3737.22 (0.000)
Season
 Spring 1885/135064 (n = 9) 0.82 0.41–1.63 0.20 0.11–0.42 1275.56 (0.000)
 Summer 15,131/440994 (n = 26) 2.33 1.71–3.16 0.61 0.44–0.82 6823.59 (0.000)
 Autumn 1214/113349 (n = 9) 1.02 0.70–1.49 0.27 0.18–0.39 329.64 (0.000)
 Winter 1080/132643 (n = 12) 0.94 0.77–1.15 0.24 0.20–0.30 95.50 (0.000)
  1. All studies in the tables used the random-effect model (p < 0.1)
  2. CI confidence interval, Q-value the value of the test for subgroup differences
  3. athe incidence per person-year was calculated by multiplying the 2-week prevalence rate by 26, as there are 2607(365/14) 2-week periods in a year