NSSAL - What does NSSAL stand for? The Free Dictionary
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The spatial units used in these analyses were postcode districts because they were the smallest unit into which the NSSAL could be divided and maintain variation within geographic units.
All analyses conducted on the NSSAL were weighted to account for differential response and selection probabilities.
Data from the 1990 and 2000 NSSALs
was analysed by Prof Wellings for the ESRC report, who said half of young women and 12 per cent of men in the 2000 survey who had sex before 16 believed in retrospect it was too early.