Table 1

Demographic profile of the 548 bar workers who participated in the study; those who participated at both P1 and P3 (followed-up: N = 253) and those who were lost to follow-up by P3 (N = 295)
Followed-up (N = 253) Lost to follow-up (N = 295) p-val1
Mean Range Mean Range
Age 31.3 (18.4, 66.7) 28.0 (18.2, 71.1) <0.001
Hours Worked Per week 34.4 (2.0, 90.0) 31.9 (0.0, 168.0) 0.098
Years worked in this Bar 4.3 (0.0, 37.0) 2.0 (0.0, 26.0) <0.001
Years worked in all bars 8.8 (0.0, 43.0) 6.1 (0.0, 40.0) <0.001
N % N % Proportion lost to follow-up (%) p-val2
Sex
Male 126 49.8 137 46.4 52.1 0.406
Female 127 50.2 158 53.6 55.4
Smoking Status
Regular 104 41.1 124 42.0 54.4
Occasional 26 10.3 39 13.2 60.0 0.700
Ex 41 16.2 43 14.6 51.2
Never 80 31.6 88 29.8 52.4
Not answered 2 0.8 1 0.3
Location
Aberdeen 73 28.9 47 15.9 39.2
Glasgow 54 21.3 67 22.7 55.4
Edinburgh/Borders 63 24.9 66 22.4 51.2
Liverpool 30 11.9 35 11.9 53.8 <0.001
London 9 3.6 40 13.6 81.6
Newcastle 6 2.4 16 5.4 72.7
Rural Cumbria and Northumbria 18 7.1 24 8.1 57.1
Country
England 63 24.9 115 39.0 64.6 <0.001
Scotland 190 75.1 180 61.0 48.6
Education
School 69 27.3 69 23.4 50.0
Further Education College 77 30.4 92 31.2 54.4 0.232
University 102 40.3 119 40.3 53.8
Postgraduate 5 2.0 15 5.1 75.0
Ethnicity
Asian 0 0.0 1 0.3 100.0
Black 2 0.8 1 0.3 33.3
Mixed 2 0.8 9 3.1 81.8 0.217
Other 0 0.0 1 0.3 100.0
White 249 98.4 282 95.9 53.1
Not answered 1

The answers shown in the table are as given at P1.

1 P-value for the 2 sample test of equal means.

2 P-value for the chi-square test of equal proportions.

MacCalman et al.

MacCalman et al. BMC Public Health 2012 12:324   doi:10.1186/1471-2458-12-324

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