Peptic ulcer and childhood adversities experienced by working-aged people

Table 1 Kappa coefficients of responses between questionnaires in 1998 and 2003

	κ (95% CI)
	Peptic ulcer	No peptic ulcer
Parents divorced	0.94 (0.91-0.98)	0.90 (0.89-0.91)
Long-lasting financial difficulties in the family	0.72 (0.64-0.79)	0.74 (0.73-0.76)
Serious conflicts in the family	0.71 (0.64-0.78)	0.72 (0.71-0.74)
Often afraid of some member of the family	0.64 (0.55-0.73)	0.71 (0.69-0.72)
Someone in the family seriously or chronically ill	0.55 (0.47-0.63)	0.62 (0.61-0.64)
Someone in the family had problems with alcohol	0.82 (0.76-0.87)	0.84 (0.83-0.85)