Skip to main content

Table 2 Means for matching variables

From: Selecting a comparison group for 5-year oral and pharyngeal cancer survivors: Two methods

  Sample Size* Mean (S.D.)
Group Survivor Peer Listed Survivor Peer Listed
Variable       
Age (yrs)** 100 44 96 64.90 (10.09) 57.40 (13.9) 64.4 (10.08)
Days of Smoking in the past 30 100 44 96 4.25 (10.3) 6.29 (11.7) 2.54 (8.13)
Lifetime duration of smoking 60 27 53 36.60 (15.0) 30.40(14.2) 28.90 (15.1)
How often do you drink alcohol? (during month) 100 44 95 1.50 (1.63) 1.50 (1.30) 1.64 (1.64)
How much alcohol do you drink on a typical day when you are drinking? (number of drinks) 99 42 95 0.66 (0.70) 0.98 (0.87) 0.77 (0.74)
How often do you drink six drinks of alcohol in one day? (during month) 100 34 95 0.78 (0.95) 1.03 (1.31) 0.82 (0.82)
  1. *: Sample sizes vary due to missing data.
  2. **: Median ages (range) in survivor group, peer group, and listed group were 65.5 (33-90), 59.5 (29-80), and 64.0 (32-90), respectively.