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Table 1 Standardized Mortality Ratios (SMR) for overall mortality and by subgroup.

From: Impact on mortality and cancer incidence rates of using random invitation from population registers for recruitment to trials

  Number Expected Mortality Observed Mortality SMR L95%CI U95%CI
OVERALL 202593 12247 4569 37.3% 36.2% 38.4%
CENTRE       
Gateshead 17321 1140 469 41.1% 37.5% 45.0%
St Barts London 19963 1199 474 39.5% 36.0% 43.2%
Liverpool 10108 613 297 48.4% 43.1% 54.3%
Nottingham 16765 1091 430 39.4% 35.8% 43.3%
Manchester 16498 940 375 39.9% 35.9% 44.1%
Derby 14917 858 312 36.4% 32.5% 40.7%
Royal Free London 16709 920 306 33.3% 29.7% 37.2%
Portsmouth 19175 1341 490 36.5% 33.4% 39.9%
Bristol 16556 1108 342 30.9% 27.7% 34.3%
Belfast 13579 750 241 32.2% 28.2% 36.5%
Cardiff 16756 886 338 38.2% 34.2% 42.5%
North Wales 14324 861 298 34.6% 30.8% 38.8%
Middleborough 9922 541 197 36.4% 31.5% 41.9%
AGE GROUP       
50-54 39392 882 417 47.3% 42.8% 52.0%
55-59 55592 1977 825 41.7% 38.9% 44.7%
60-64 47073 2658 948 35.7% 33.4% 38.0%
65-69 38568 3530 1259 35.7% 33.7% 37.7%
70-74 21967 3200 1120 35.0% 33.0% 37.1%
BMI SCORE       
Underweight (up to 18.5) 2548 157 111 70.6% 58.1% 85.0%
Normal (18.5-25) 82888 4903 1701 34.7% 33.1% 36.4%
Overweight (25-30) 74284 4640 1586 34.2% 32.5% 35.9%
Obese (over 30) 41903 2486 1113 44.8% 42.2% 47.5%
YEAR IN TRIAL (women years)      
1st 202501 1732 320 18.5% 16.5% 20.6%
2nd 202028 1914 660 34.5% 31.9% 37.2%
3rd 201314 2111 800 37.9% 35.3% 40.6%
4th 197029 2290 903 39.4% 36.9% 42.1%
5th 156319 1955 841 43.0% 40.2% 46.0%
6th 106119 1393 631 45.3% 41.8% 49.0%
7th 49590 719 349 48.6% 43.6% 53.9%
8th 8136 133 65 49.0% 37.9% 62.5%
  1. Average time on trial = 5.55 yrs/woman