Table 6

Spline regression analysis, Duodenal bleeding ulcers

Males

Females

Year

Coef.

95% Conf. interval

Coef.

95% Conf. interval


1975

-0.23

-0.52

0.06

-0.23

-0.53

0.08


1980

0.01

-0.03

0.06

0.05

-0.004

0.10


1985

0.04

-0.004

0.08

0.06

0.02

0.11


1990

0.05

0.003

0.09

0.06

0.01

0.11


1995

-0.10

-0.14

-0.05

-0.07

-0.11

-0.02


2000

-0.09

-0.12

-0.05

-0.09

-0.13

-0.06


Hermansson et al. BMC Gastroenterology 2009 9:25   doi:10.1186/1471-230X-9-25

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