Table 3 Unadjusted and adjusted associations between independent variables and the odds for appendicitis in 177 children with suspected appendicitis.

Age (years)

0.96 (0.85–1.08)

0.499

Sex (male)

2.53 (1.23–5.20)

0.012

2.63 (1.24–5.56)^{a, b,c, d,e, f}

0.012

Symptom duration (h)

0–24

Ref

Ref

Ref ^{a, b, c, d, e, f}

Ref

24–48

0.91 (0.39–2.12)

0.832

0.93 (0.39–2.21)

0.869

48–96

0.63 (0.24–1.66)

0.351

0.67 (0.25–1.81)

0.427

>96

0.12 (0.02–0.71)

0.020

0.14 (0.21–0.90)

0.039

Serum IgA (g/L)

0.72 (0.45–1.16)

0.177

0.70 (0.41–1.20) ^a

0.195

Age-dependent serum IgA*

Normal

Ref

Ref

Ref ^b

Ref

High

0.58 (0.10–3.35)

0.546

0.45 (0.05–3.83)

0.463

Low

1.08 (0-48-2.44)

0.855

1.27 (0.53-3.00)

0.592

CRP (mg/L)

1.01 (0.99–1.01)

0.295

1.01 (0.99–1.02)^c

0.127

Leukocytes (x10⁹/L)

1.17 (1.08–1.27)

< 0.001

1.17 (1.08–1.27)^d

< 0.001

Neutrophils (x10⁹/L)

1.21 (1.11–1.32)

< 0.001

1.21 (1.10–1.33)^e

< 0.001

Neutrophil percentage (%)

1.07 (1.03–1.10)

< 0.001

1.07 (1.03–1.10)^f

< 0.001