Male bylines and sexist stereotypes dominate Britain's national newspapers, new research out today has revealed. We have the full background data behind this story for you to explore.

A study by Women in Journalism (WiJ) found that 78% of all front-page articles were written by men compared to 22% by women. Nine national newspapers were analysed over the course of four weeks and revealed results that closely reflect research done by the Guardian last year. It also complements this analysis of online representation of women carried out earlier this year.

The WiJ report also looked at the lead pictures on the front page and found that the Duchess of Cambridge and her sister Pippa Middleton, along with victim Madeline McCann were the most regularly pictured females. Amelia Hill writes today:

Sexist stereotypes, humiliating photographs of women and male bylines dominate the front pages of British newspapers, according to research carried out by the industry body Women in Journalism (WiJ). Male journalists wrote 78% of all front-page articles and men accounted for 84% of those mentioned or quoted in lead pieces, according to analysis of nine national newspapers, Monday to Saturday, over the course of four weeks.

The tables below show the bylines by each of the nine papers analysed and also the front page photographs. The downloadable spreadsheet contains the daily breakdown by paper and also the overall analysis. What can you do with this data?

Data summary

Bylines by paper Click heading to sort table. Download this data Paper No. of bylines (total) No of male bylines No of female bylines % male % female Daily Express 24 12 12 50 50 Daily Mail 37 28 9 76 24 Daily Mirror 28 22 6 79 21 FT 137 91 46 66 34 Guardian 87 68 19 78 22 Independent 70 64 6 91 9 Sun 40 33 7 83 18 Telegraph 142 122 20 86 14 Times 65 53 12 82 18 TOTAL 630 493 137 78 22

Photos by paper Click heading to sort table. Download this data Paper Total number of photos of people anywhere on the front page How many are predominantly or exclusively of men? How many are predominantly or exclusively of women? % men % women Daily Express 49 10 27 20 55 Daily Mail 45 7 25 16 56 Daily Mirror 124 58 51 47 41 FT 78 51 13 65 17 Guardian 99 51 32 52 32 Independent 124 73 38 59 31 Sun 93 47 32 51 34 Telegraph 87 38 43 44 49 Times 109 67 30 61 28 Total 808 402 291 50 36

• DATA: download the full spreadsheet

NEW! Buy our book

• Facts are Sacred: the power of data (on Kindle)

More open data

Data journalism and data visualisations from the Guardian

World government data

• Search the world's government data with our gateway

Development and aid data

• Search the world's global development data with our gateway

Can you do something with this data?

• Flickr Please post your visualisations and mash-ups on our Flickr group

• Contact us at data@guardian.co.uk

• Get the A-Z of data

• More at the Datastore directory

• Follow us on Twitter

• Like us on Facebook