Table 3.

Predictors of quality score for different factors including paper type, week, day, food category, health category, named journalist and article size

Factors predicting article quality score	n	OR	95% CI OR	P value for comparison with ref	P value for likelihood ratio test
Paper title: reference category is	40				0.95
The Daily Mail
The Sun	20	0.80	0.03 to 25.21	0.90
The Daily Mirror	23	0.60	0.07 to 4.84	0.63
The Daily Express	30	0.78	0.10 to 5.83	0.81
The Daily Telegraph	28	0.78	0.16 to 3.88	0.77
Day: reference category is Tuesday	35				<0.01
Monday	27	3.90	1.09 to 13.92	0.04
Wednesday	25	3.83	0.31 to 47.20	0.30
Thursday	25	13.64	0.65 to 287.6	0.09
Friday	15	6.94	1.02 to 47.19	0.05
Saturday	14	0.21	0.09 to 0.53	<0.01
Food: reference category is energy	27				0.03
Alcohol	18	3.72	0.41 to 34.19	0.25
Fruit and vegetables	25	0.66	0.04 to 11.81	0.78
High fat and processed foods	21	0.39	0.02 to 8.49	0.55
Protein and dairy foods	21	4.66	0.36 to 60.27	0.24
Sugary drinks and confectionery	9	1.56	0.25 to 9.67	0.63
Other (vitamins and ingredients)	20	0.86	0.06 to 12.17	0.91
Health: reference category is obesity	35				0.03
Cancer	8	24.30	3.17 to 186.2	<0.01
CVD	34	11.73	2.69 to 51.24	<0.01
Type 2 diabetes	17	12.31	1.55 to 98.04	0.02
Neurological disorders	22	7.18	0.85 to 60.84	0.07
Life expectancy	10	1.75	0.10 to 30.17	0.70
Other (respiratory and reproductive)	12	3.61	1.04 to 12.61	0.04
Named journalist: reference category is yes	98				<0.01
No named journalist	43	0.10	0.01 to 0.84	0.03
Article size: reference category is small	82				0.52
Medium-sized articles	36	0.92	0.66 to 2.78	0.88
Large-sized articles	23	2.79	0.66 to 11.75	0.16

CVD, cardiovascular disease.