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Table 2 Rate comparison for all-cause hospitalization between BMI categories, by sex

From: The impact of general and central obesity for all-cause hospitalization among Iranian adults: a 20 year follow-up-results from the TLGS cohort

 

BMI category

*Crude rate values

Crude rate per 1000 person-year (95% CI)

Crude rate ratio (95% CI)

**Age adjusted rate ratio

(95% CI)

†Multivariable adjusted rate ratio (95% CI)

Men

Normal weight

(n = 1389)

1548/20,758

74.5 (68.3–80.7)

Reference

Reference

Reference

Overweight

(n = 1737)

2057/26,839

76.6 (71.5–81.7)

1.02 (0.96–1.09)

1.06 (0.95–1.16)

1.07 (0.97–1.18)

Obese

(n = 601)

803/9207

87.2 (78.1–96.3)

1.17 (1.07–1.27)

1.27 (1.11–1.42)

1.27 (1.12–1.43)

Women

Normal

(n = 999)

886/15,889

55.7 (50.1–61.3)

Reference

Reference

Reference

Overweight

(n = 1867)

2192/29,562

74.1 (69.0-79.2)

1.33 (1.22–1.43)

1.19 (1.05–1.34)

1.17 (1.03–1.31)

Obese

(n = 1609)

2354/25,173

93.5 (87.0-99.9)

1.67 (1.55–1.81)

1.44 (1.27–1.61)

1.40 (1.23–1.56)

  1. *Total number of hospitalization/number of person-years
  2. ** Rate ratio were estimated using negative binomial models adjusted for age
  3. Rate ratio were estimated using negative binomial models adjusted for age, education level, smoking status, marital status and physical activity level
  4. BMI: body mass index; CI: confidence interval
  5. Normal weight: BMI ≥ 18.5 to < 25.0 kg m2; Overweight: BMI ≥ 25.0 to < 30.0 kg m2; Obese: BMI ≥ 30.0 kg m2