Table 3. Self reported sick days from infectious disease and risk of CABT.

	Overall CABT				Gliomas				Embryonal CNS tumour				Other CABT
	Cases	Controls	OR	95% CI	Cases	Controls	OR	95% CI	Cases	Controls	OR	95% CI	Cases	Controls	OR	95% CI
No. of days of infectious disease (0–<1 year)
Once or less per month	244	440	1.00	Reference	131	245	1.00	Reference	37	73	1.00	Reference	76	122	1.00	Reference
2–3 Days per month	67	122	1.02	0.72–1.43	35	62	1.13	0.69–1.82	16	27	1.16	0.57–2.39	16	33	0.79	0.41–1.52
4 Days or more per month	32	39	1.60	0.96–2.65	23	21	2.37	1.22–4.63	5	6	1.75	0.52–5.88	4	12	0.53	0.16–1.74
No. of days of infectious disease (1–<3 years)
Once or less per month	214	418	1.00	Reference	111	235	1.00	Reference	35	68	1.00	Reference	68	115	1.00	Reference
2–3 Days per month	81	131	1.23	0.88–1.72	45	68	1.41	0.88–2.26	15	33	0.91	0.43–1.95	21	30	1.24	0.67–2.28
4 Days or more per month	49	61	1.60	1.07–2.40	32	29	2.43	1.39–4.24	10	10	1.90	0.75–4.82	7	22	0.56	0.23–1.37
No. of days of infectious disease (3–<6 years)
Once or less per month	237	429	1.00	Reference	126	242	1.00	Reference	36	70	1.00	Reference	75	117	1.00	Reference
2–3 Days per month	72	144	0.93	0.66–1.32	39	77	1.03	0.65–1.65	17	34	1.06	0.46–2.45	16	33	0.76	0.39–1.49
4 Days or more per month	37	43	1.62	1.00–2.63	25	18	2.87	1.45–5.67	7	7	2.08	0.64–6.70	5	18	0.43	0.15–1.25
No. of days of infectious disease (0–<6 years)
Once or less per month	227	436	1.00	Reference	118	245	1.00	Reference	34	77	1.00	Reference	75	114	1.00	Reference
2–3 Days per month	71	117	1.27	0.89–1.80	40	59	1.60	0.97–2.62	15	23	1.48	0.68–3.22	16	35	0.75	0.38–1.49
4 Days or more per month	43	44	1.87	1.19–2.97	29	22	2.93	1.57–5.50	9	5	4.21	1.24–14.30	5	17	0.42	0.15–1.78

Abbreviations: CABT=childhood and adolescent brain tumour; CI=confidence intervals; CNS=central nervous system; OR=odds ratio.

Conditional logistic regression analyses, which adjusts for matching factors (age, gender and region) expressed as OR values and with 95% CI.