Measure to analyse title reach. Magazines and weekly supplements: This indicator is the equivalent of a basic measure of title reach known as AIR (Average Issue Readership). It is the breakdown of answers to the question about number of read issues (LCW4): How many of the last four issues of [title] did you read or look at?
The value of the variable LCW4 (one of the numbers from the set {0, 1, 2, 3, 4}) divided by 4 determines the percentage of issues (out of last four issues) read by a respondent. The mean of this quotient in a given group corresponds with the readership of an average issue, that is CPW indicator in this group.
Dailies and publications which come out 2-4 times a week: Basic measure of reach (equivalent of AIR), the mean of CDT indicators.

Measure of wide reach of a title and reader profile. Magazines and weekly supplements: CCS is a measure of wide reach of a title indicating what proportion of population had contact with the title at least once during the seasonal cycle (which is: for weeklies – 4 weeks, for biweeklies – 3 months, for monthlies and bimonthlies – 6 months and 4 weeks for weekly supplements).

Dailies and publications which come out 2-4 times a week: Measure of wide reach of a title indicating what proportion of population had contact with the title at least once during the seasonal cycle (one week).

A group of main indicators defining the reach of a newspaper for individual days of week when a daily is published. During an interview a series of questions is asked in order to determine the readership on particular days.
CDT for Monday equals the number of positive answers to the following question:
For dailies: Did you read a Monday's issue of [title]?
For publications which come out a few times a week: Did you read a copy of [title] last Monday?
(Such publications may be distributed on different days than they are dated – sometimes before that day – that is why we rely on readers' identification rather than the issue date). The question is asked for other days when dailies/ publications are issued.

Applies only to magazines and supplements. Measure of wide reach of a title, indicating what proportion of population had contact with the title within the last publication period (which is: for weeklies – one week, for biweeklies – two weeks, for monthlies – one month and for weekly supplements – one week).

Magazines: The breakdown of answers (variable) to the question (LCW4):
For magazines: How many of the last four issues of [title] did you read or look at?
For supplements: How often do you read or look at the supplement [title] of [title]? How many of the last four issues did you read or look at?
Dailies and publications which come out 2-4 times a week: Variable equal to the sum of the value of variables CDT for all days of publication in the seasonal cycle (LCW).

Measure equal to the mean of LCW4 variable calculated, however, not on the entire group of respondents, but on the group of people who read at least one  of the last four issues.

Variable used to analyse reader profile of an average issue of a chosen title. It may be used to analyse the reach of title groups (for groups it is impossible to conduct such analyses on the basis of CPW indicator).
Magazines and weekly supplements: Variable defining respondent groups with the profile typical of readers of hypothetical “average issue” of a magazine. It is a binary variable, taking on value 1 with the probability equal to the percentage of issues of a given magazine read by a respondent.
Dailies and publications which come out 2-4 times a week: This variable shows the readership of one, randomly selected issue of a daily publication from the last seven days prior to the survey. This variable defines a group of respondents with the profile typical of readers of hypothetical “average issue” of a publication.
Note: in the case of dailies with different readership figures during a week caution is recommended in the application of the SCPW in favour of its replacement by the CWDT in analysing variables.
SCPW is now used instead of COW (Readership of Last Issue) indicator.