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. 2019 Dec 11;9(12):e032342. doi: 10.1136/bmjopen-2019-032342

Table 7.

Respondent bias assessment based on dispensing volumes

NHS dispensing monthly (March 2018) statistics Number of prescription forms (nominal) Number of prescription items (nominal)
Mean
 (England) Population 3564 (3564±0) 7132 (7132±0)
 Invited 3633 (3564+69) 7366 (7132+234)
 Respondent 3693 (3564+129) 7444 (7132+312)
 Non-respondent (excluding closures and abatements) 3666 (3564+102) 7444 (7132+312)
SD
 (England) Population 2692 (2692±0) 5167 (5167±0)
 Invited 2053 (2692–639) 4296 (5167–871)
 Respondent 2154 (2692–538) 4569 (5167–598)
 Non-respondent (excluding closures and abatements) 1999 (2692–693) 4171 (5167–996)

NHS, National Health Service.