Table 2.

Negative control outcomes. Outcomes not believed to be caused by any of the exposures of interest.

acariasis	ingrowing nail
amyloidosis	iridocyclitis
ankylosing spondylitis	irritable bowel syndrome
aseptic necrosis of bone	lesion of cervix
astigmatism	Lyme disease
Bell's palsy	malignant neoplasm of endocrine gland
benign epithelial neoplasm of skin	nononeuropathy
chalazion	onychomycosis
chondromalacia	osteochondropathy
Crohn's disease	paraplegia
croup	polyp of intestine
diabetic oculopathy	presbyopia
endocarditis	pulmonary tuberculosis
endometrial hyperplasia	rectal mass
enthesopathy	sarcoidosis
epicondylitis	scar
Epstein–Barr virus disease	seborrhoeic keratosis
fracture of upper limb	septic shock
gallstone	Sjogren's syndrome
genital herpes simplex	Tietze's disease
haemangioma	tonsillitis
Hodgkin's disease	toxic goitre
human papilloma virus infection	ulcerative colitis
hypoglycaemic coma	viral conjunctivitis
hypopituitarism	viral hepatitis
impetigo	visceroptosis