Table 2 The relative risk of SAH by region, gender, age category and period, and the (standardised) SAH incidence rates per 100 000 person-years (95% CI in brackets)
Number of casesCrude incidence rate/100 000 person-yearsStandardised incidence rate/100 000 person-years*RRadj (95% CI)†
Region
    Southern815511.4211.36REF
    Central794812.8012.971.14 (1.10 to 1.18)
    Northern234015.2114.831.31 (1.25 to 1.37)
Gender
    Male758510.3110.72REF
    Female1085814.4213.891.30 (1.26 to 1.34)
Age (years)
    0–298521.521.510.06 (0.06 to 0.07)
    30–3913136.356.390.27 (0.26 to 0.29)
    40–49319915.4415.450.65 (0.63 to 0.69)
    50–59420823.4223.66REF
    60–69380926.6326.461.12 (1.08 to 1.18)
    70–79326127.0226.551.13 (1.09 to 1.19)
    80+180125.8124.931.05 (1.01 to 1.13)
Period
    1987–1994873212.6812.88REF
    1995–2002971111.3211.980.93 (0.90 to 0.96)
  • SAH, subarachnoid haemorrhage.

  • *Incidence rates standardised to the complete Swedish population, using the direct method.

  • †Relative incidence rate mutually adjusted for age, gender, region and period.