Variable | Incidence rate ratio (95% CI) | Z | P-value |
---|---|---|---|
Females | |||
IAS illness behaviour | 1.71 (1.37 to 2.11) | 4.816 | <0.001 |
Physical chronic illnessa | 1.72 (1.44 to 2.05) | 5.999 | <0.001 |
GHQ-12 | 1.21 (1.05 to 1.38) | 2.583 | <0.01 |
Psychiatric chronic illnessa | 1.45 (1.12 to 1.87) | 2.849 | 0.004 |
Somatic symptom score | 1.45 (1.09 to 4.04) | 2.229 | 0.026 |
Males | |||
IAS illness behaviour | 2.32 (1.74 to 3.11) | 5.725 | <0.001 |
Somatic symptom score | 2.88 (1.57 to 5.28) | 3.415 | 0.001 |
Physical chronic illnessa | 1.39 (1.06 to 1.81) | 2.389 | 0.017 |
IAS health anxiety | 1.23 (1.02 to 1.49) | 2.199 | 0.028 |
↵a no chronic illness as reference group. GHQ-12 = 12 item version of the General Health Questionnaire. IAS = Illness Attitude Scale. Associations are expressed as incidence rate ratios. For categorical variables the relative increase in consultation is expressed in relation to a reference group. For continuous variables the incidence rate ratio has been expressed as the relative increase in consultation per 10-unit change of the continuous variable (5-unit change for the Somatic Symptom Scale). The potential scoring range for continuous variables: GHQ-12 0–36, IAS health anxiety 0–44, IAS illness behaviour, somatic symptom score 0-7, age 23–71 year).