Table 5. Statistical analysis of anaemic status, both pre-chemotherapy and anytime against tumour regression grade.

Anaemia status	Responders (TRG 1–3)	Non-responders (TRG 4–5)	Total	χ P value	Odds ratio/95% CI
Pre-chemotherapy anaemia
Yes	43	57	100	0.130	0.675 (95% CI, 0.420–1.161)
No	56	110	166
Anytime anaemia
Yes	83	141	224	0.931	0.881 (95% CI, 0.406–1.914)
No	16	28	44
Pre-chemotherapy severity
Severe/moderate	8	15	23	0.292
Mild	35	42	77
Normal	56	110	166
Anytime anaemia severity
Severe/moderate	42	67	109	0.902
Mild	41	74	115
Normal	16	28	44

Each test is a Chi-squared analysis due to categorical data and outcome. Statistical notations: χ denotes Chi-squared test, denotes data missing.