Table 1 Characteristics of sample of patients seen after 999 calls: full cohort and sub-cohort follow up

 Sample size (n)

4219

321

–

 Mean age ± SD (range)

57.6 ± 22.7 (17–102)

64.2 ± 23.4 (17–102)

< 0.001

 Female (n, %)

2156 (51.1%)

188 (58.6%)

< 0.01

 Sample size (n)

137

143

–

 Mean age ± SD (range)

58.4 ± 22.7(18–102)

63.1 ± 24.1(18–98)

0.10

 Female (n, %)

80 (58.4%)

81 (56.6%)

0.77