Table 4 Risk ratios (RR) and 95 % confidence intervals for incidence of acute myocardial infarction on the first 3 days and the first week after clock shift. Significant risk ratios are highlighted in bold-face letters

Model description

RR

[95 % CIs]

RR

[95 % CIs]

RR

[95 % CIs]

RR

[95 % CIs]

All

1.102

(0.972;1.250)

1.077

(0.981;1.182)

0.981

(0.858;1.121)

1.025

(0.928;1.133)

Men

1.155

(1.000;1.334)

1.106

(0.993;1.232)

1.008

(0.860;1.181)

1.040

(0.924;1.171)

Women

0.957

(0.738;1.240)

1.001

(0.831;1.205)

0.914

(0.708;1.18)

0.986

(0.814;1.195)

Age ≤65 years

1.030

(0.853;1.245)

1.018

(0.886;1.170)

0.980

(0.813;1.183)

1.069

(0.933;1.226)

Age >65 years

1.184

(0.983;1.426)

1.145

(0.997;1.316)

0.980

(0.807;1.192)

0.977

(0.841;1.135)

Working

0.957

(0.712;1.286)

1.074

(0.873;1.322)

0.940

(0.705;1.253)

1.008

(0.816;1.246)

Not working

1.126

(0.953;1.330)

1.079

(0.952;1.224)

0.952

(0.793;1.143)

0.991

(0.863;1.137)

Recurrent AMI

1.049

(0.792;1.389)

0.994

(0.807;1.225)

1.319

(1.029;1.691)

1.270

(1.048;1.539)

First AMI

1.101

(0.941;1.287)

1.094

(0.974;1.228)

0.864

(0.726;1.030)

0.940

(0.826;1.068)

Non-fatal AMI

1.140

(0.950;1.369)

1.083

(0.944;1.242)

0.949

(0.778;1.159)

1.020

(0.88;1.181)

Fatal AMI

1.062

(0.878;1.283)

1.072

(0.933;1.233)

1.018

(0.840;1.233)

1.035

(0.894;1.197)

Diabetes mellitus yes

1.082

(0.850;1.377)

1.075

(0.900;1.284)

0.992

(0.772;1.273)

0.966

(0.797;1.171)

Diabetes mellitus no

1.040

(0.878;1.233)

1.039

(0.917;1.178)

0.944

(0.790;1.127)

1.026

(0.900;1.169)

Hypertension yes

1.067

(0.898;1.267)

1.062

(0.935;1.205)

0.942

(0.786;1.13)

0.972

(0.847;1.114)

Hypertension no

1.072

(0.848;1.356)

1.076

(0.905;1.279)

0.956

(0.751;1.217)

1.090

(0.917;1.296)

Hyperlipidemia yes

0.985

(0.812;1.194)

1.015

(0.881;1.168)

0.945

(0.774;1.154)

0.973

(0.838;1.130)

Hyperlipidemia no

1.175

(0.955;1.446)

1.113

(0.952;1.300)

0.950

(0.763;1.182)

1.034

(0.880;1.216)

Body Mass Index ≤30 kg/m2

1.147

(0.971;1.354)

1.12

(0.990;1.266)

1.005

(0.848;1.192)

1.011

(0.889;1.151)

Body Mass Index >30 kg/m2

1.007

(0.816;1.242)

1.016

(0.871;1.186)

0.932

(0.748;1.161)

1.049

(0.895;1.230)

Current smoker

0.841

(0.62;1.1420)

0.870

(0.696;1.089)

0.955

(0.715;1.276)

1.211

(0.993;1.477)

Former smoker

1.185

(0.902;1.556)

1.143

(0.932;1.403)

0.966

(0.724;1.288)

0.950

(0.761;1.186)

Never-smoker

1.071

(0.797;1.440)

1.106

(0.893;1.369)

1.009

(0.749;1.359)

1.080

(0.869;1.342)

Antiplatelets yes

1.204

(0.932;1.554)

1.140

(0.939;1.385)

0.906

(0.688;1.192)

0.932

(0.756;1.148)

Antiplatelets no

1.047

(0.881;1.245)

1.048

(0.923;1.190)

0.973

(0.810;1.168)

1.023

(0.892;1.173)

Betablockers yes

1.021

(0.773;1.347)

1.026

(0.839;1.255)

1.009

(0.774;1.315)

0.961

(0.780;1.185)

Betablockers no

1.119

(0.945;1.324)

1.095

(0.966;1.242)

0.935

(0.779;1.122)

1.012

(0.885;1.157)

Calcium antagonists yes

0.995

(0.742;1.335)

1.077

(0.873;1.329)

0.922

(0.687;1.238)

1.000

(0.806;1.241)

Calcium antagonists no

1.125

(0.95;1.331)

1.076

(0.948;1.220)

0.967

(0.811;1.153)

0.996

(0.871;1.138)

ACE inhibitors yes

1.489

(1.151;1.927)

1.297

(1.063;1.582)

0.781

(0.562;1.086)

0.928

(0.732;1.177)

ACE inhibitors no

1.036

(0.865;1.241)

1.059

(0.928;1.208)

1.010

(0.839;1.214)

1.015

(0.882;1.168)

Lipid lowering drugs yes

1.151

(0.839;1.580)

1.163

(0.921;1.469)

0.761

(0.539;1.075)

0.784

(0.601;1.023)

Lipid lowering drugs no

1.129

(0.954;1.336)

1.105

(0.975;1.251)

1.000

(0.833;1.199)

1.042

(0.909;1.193)