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Table 1 Characteristics of recruited sites

From: Impact of reducing portion sizes in worksite cafeterias: a stepped wedge randomised controlled pilot trial

  Site
  1 2 3 4 5 6 7 8 9
Type of site Office Manufacturing & Office Depot Office Manufacturing Manufacturing & Office Depot Manufacturing Depot
No of employees 748 1154 668 956 477 269 1300 541 1060
Percentage that are full time 90.5 98.2 97.0 89.5 96.0 94.8 90.3 97.2 88.5
Mean agea 38.0 38.3 45.5 36.7 36.5 38.5 45.5 Missing 40.5
Percentage that are female 47.9 39.7 12.7 60.8 10.3 38.3 12.9 7.9 24.8
Predominant occupational groupb C1&C2 A&B D&E A&B D&E C1&C2 C1&C2 D&E D&E
Mean cost of main meal (£) 3.25 3.34 2.75 3.25 2.83 3.00 1.20 2.53 1.28
  1. a Reported in age bands, and estimated using the mean age value for employees in each age band
  2. b A&B: Higher and intermediate managerial, administrative and professional occupations; C1&C2: Supervisory, clerical and junior managerial, administrative, professional occupations and skilled manual occupations; D&E: Semi-skilled and unskilled manual occupations